Walk. Just like I would hike when I lived rurally, walk. There are trails along the River and through the woods, even in the middle of town. But there’s also sidewalks. A town common. Parks. Several playgrounds have pickup basketball if your knees are better than mine, or there’s a track within an easy walk for some more regimented exercise. Our favorite activity starting during Covid is to walk around our city, seeing the sights. It was a great chance to talk with my kids for hours, before they went off to college. And yes we played Pokémon go as something to do while walking (and a game like that is much better in cities), and met several groups of people that way. If that game is too nerdy or childish, there are apps that gamify walking in various ways. If you’re willing to spend a little, sometimes we would stop at a convenience store for a soda or something, but not always.

When I lived in the major city, it was the same only much more. Every weekend had a festival (free). Every weekend had a band playing somewhere outside free. Every weekend had some big free event at multiple parks. Every Wednesday was free museums. Walking the waterfront is really cool and entirely free. Tourist areas sometimes have street entertainers, free. My city is very walkable and has many colleges: every weekend had some event at some college. My city has a lot of history and tourism, organized as a free “trail” and with most historic things free. There are things like a sailing ship that is free to see: you would have to pay for the museum and gift shop but why would you? Read the historic plaques. If a building or something looks historic, look it up.

For a relatively small amount of money, one of my favorite activities was the farmers market: it was huge and cheap (although I haven’t been in many years). Sometimes I just wanted to walk around and see everything (that shopping is selling whole goats?), or I could buy a week’s worth of veggies fresh from the farm for pennies on the dollar. And connect that back to food prep: when I didn’t have much money or time, I’d take all Saturday, goto the farmers market, come back and put together a giant salad for the week, a pasta salad for the week, maybe marinate some meat in some ingredients I bought- basically get half my cooking and shopping out of the way, dirt cheap

For a relatively small amount of money, much cheaper than operating a car, I usually had a subway pass. The core of that major city is very walkable, but the pass opened the entire city by just hopping on a convenient train without having to think about spending in the moment.

As far as staying in the small apartment goes, being in an urban area means gigabit fiber, which I guess a lot of people still don’t have. Being a first class citizen online is priceless and opens a lot of free (after your internet bill) activities involving sitting at your desk

I’m an Uber nerd andI learn to pirate content. Yes you still need an internet connection and a computer or phone but I can spend days trying to figure out how to install Graphene on my old phone or do something fun or crazy for my home assistant.

Btw, I’m not poor. I just enjoy doing these things.

Hah, let me turn this around - what do you do for fun without a whole city to explore? Hike, swim in the creek/at the beach, BBQ with friends? Same here, we just do the first two in public places (parks, pools or community beach, etc)

In my town, there’s a lot of beautiful parks to hang out at. I can take a workshop down at the library. The museums sometimes have free admission days. There’s lots of great things to do at low or no cost, you just have to look for them.

This is one place where traditional social media shines. Following local establishments on Facebook, or joining your city’s subreddit, can keep you in the loop about cheap or free events in your city.

High-paying jobs come to cities, so a sizable number of people really are spending money for everything. Think of it like video game microtransactions.

Of course, to a small extent, it’s also nice that you’re not making car payments, including wear and tear, insurance, and gas.

Where I live, there are also city calendars that help you find the free festivals that cost less. These are often more scheduled rather than “all the time”, so they’re not convenient for tourists.

Other people already gave most of the answers, but

Parks. Go for a walk. Play a game with folks (Frisbee, soccer, whatever). Ride a bike. Read.

Meetups. I go to a tabletop RPG one. That’s not unique to cities, but I can walk to this one and there are probably more people attending than you’d find in a less populous area. I also used to go to a basic neighborhood hangout one. There are many others.

The library is free. Many books and other media to enjoy.

This city has beaches. It’s $3 for the subway ride there , or if I was really broke I could ride a bike.

There are free museums. I don’t go that often but they’re interesting.

But also

And to make it worse many of them probably have a 1 bedroom apartment so its not like you can sit in there all day long (at least i cant).

I realize im still spending money by being in my house out of town, but still, at least things I buy are owned by me, and im not paying someone else every time I want to do anything. If I want to stay at home all day I have tons of stuff to occupy my mind without going nuts.

I don’t think I accept this premise. I stay home in my one bedroom without any more trouble than when I lived in the suburbs. A computer full of games doesn’t need a lot of rooms. I have plenty of entertainment here. I don’t see what’s stifling about a one bedroom. Maybe a tiny studio I could see. But even so, when I lived in a whole house it’s not like I went skipping from room to room.

I know not everyone loves church, but my church has an open building day you can come and co-work or just read or sit and relax and chat or whatever, we put out good local coffee shop coffee and tea, and you can hang around as long as you want in an old building with beautiful stained glass windows and use the WiFi, etc. We were talking about how there’s not really anywhere much else you can do that without spending money, you can sit in the library but it’s not like you can heat up your leftover spaghetti and sit on a comfy couch. It’s really a nice way to spend a day.

Fully free assuming you have some level of equipment:

• Attend the local parkrun for a free 5k race
• Go for a walk in the park/forest, of which my city has a plethora
• Go for a walk in Old Town
• If in summer, go for a swim in the lakes
• Take a long bike ride
• If during winter, go ice skating
• Work out at an outdoor gym

Pretty cheap activities:

• Take one of the public transit boats out to the archipelago
• Take the train somewhere
• Check out a museum

When I lived in the city I was dead broke but had a great time. I hung out at the library, which was its own cool thing but also served as a community hub to let me know when the local Gurudwara was doing a luncheon, or when crafting clubs met, and having a library card also came with some museum passes. I learned about all sorts of cool, free goings on through my library.

There were also local attractions that had free days or days for locals, and there were street festivals nearby that had live music and performances. One of my favorite things about living in the city was hearing the sound of live music and walking out the door to go follow it to some cool, hitherto unknown to me event that was happening.

We also went ice skating on the pond in the park (free if you had your own skates), or went biking on bike paths. We built snow sculptures in public parks and gardens and just walked around exploring. There were lots of beautiful and interesting buildings and side streets where we could get pleasantly lost.

The key part of where I was is that it was walkable, and there were plenty of “third spaces”. I understand not all cities have that. However, if you’re in the US I highly recommend starting with your local library.

There’s lots of free public spaces in my area. But it’s also just as easy to stay home in a big city.

I spend a lot of time in my workshop. It’s not free but upcycling materials into something new is infinitely satisfying and often saves money.

Pregame. Dive bars

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If you’re a musician, look for open mics / open jams and try to make friends in the scene. Musician-organized diy events are cheap and fun. Especially punk events are cheap.
If you’re interested in art, look for local diy group exhibitions and performances and ask if you can volunteer for support.
If you’re into hacking/diy look for local repair cafes and ask to volunteer.
If you’re into rpg go hang out in local game shops and find a group to play with.
It really depends on what you consider fun!

I would like to kick this back to you, what do you do outside of a big city that is free?