your school has a great gym. And hiking in the rain can't be beat!
I hate the gym. The gym is for people that don't have a trainer and are too weak to go outside! Why would I go to a nasty room full of people when I could sweat in my room alone or go outside (or if neither of those are appealing, sit in my bed and watch a movie)?
A lot of people go to the gym. I haven't been convinced.