It would be easy enough to buy a few kettlebells.
It would be easy to take those kettlebells and learn this exercise, this exercise, and this one. That, combined with walking, running, bicycling, and a pull-up bar at the local playground is all I’d need to stay fit.
I still have a gym membership for three reasons:
1) It’s cheap for Fredonia faculty and staff: $77 for the entire year. (prices might increase slightly soon.)
2) The gym gives me a place to do a focused routine. If I were at home I’d probably get distracted and break my routine.
3) There are other people at the gym. When it comes to human health, I think community trumps exercise.