I'm unemployed right now and I won't do any of those. Here's why:
Hiking: Buy boots and suitable clothes. Fuel to get to suitable location.
Biking/Rollerskating: Buy equipment. Fuel to get to suitable location.
Picnic: transportation supplies. Fuel to get to suitable location.
Board games: Expensive. Fuel to get to suitable location.
Lan party: Buy games. Fuel to get to suitable location.
All it costs is fuel, utilities, rent, and food. For someone with no income, that is all I can spend money on, and it has to be justifiable. Not "Oh, I play board games every once in a while", because I don't want to have to pass up on a job interview because I stupidly spent my transportation money on board games. Or whatever else.
I hear what you're saying and I guess it applies for large cities (somewhat), but in our smaller city (~100k people) we just walk places. 15-25 minutes is just fun, especially in the warm season.
Picnics, games, sports, lan parties, we just do them at home or on the public domain
hiking and other stuff needs some transportation, we either go with public transport or carpooling
I'm not saying I understand your situation, just that you don't necessarily need to spend a lot of money (or any) to have some fun with friends.
Why doesn't a bike save you a lot of money on fuel? Keeping a car on the road is expensive, you can save on insurance too. Also you can take the bus. I know, it's a pain.
Hiking: Buy boots and suitable clothes. Fuel to get to suitable location.
Biking/Rollerskating: Buy equipment. Fuel to get to suitable location.
Picnic: transportation supplies. Fuel to get to suitable location.
Board games: Expensive. Fuel to get to suitable location.
Lan party: Buy games. Fuel to get to suitable location.
All it costs is fuel, utilities, rent, and food. For someone with no income, that is all I can spend money on, and it has to be justifiable. Not "Oh, I play board games every once in a while", because I don't want to have to pass up on a job interview because I stupidly spent my transportation money on board games. Or whatever else.