Middle school through high school, I actually enjoyed Gym class. The instructors doubled as the school's coaches for the various teams, and the exercise kept everyone in shape. In middle school, everyone played sports, so this was akin to recess in elementary school. In high school, everyone walked or played whatever sport we were working on that month. It was the perfect time to chat with friends, get some exercise, and gawk at teenage girls.
When I attended a middle college, we didn't have the same facilities, but there was a weight room and we walked/ran at least a mile every day. At that school, there were no sports teams to speak of, so our physical fitness instructor also taught health class. He was an interesting instructor, because in his down time he was an outdoorsman, so he had a lot of practical knowledge to give out on the subject of survival, and tons of neat outdoor gear that I'd never heard of before. Again, he didn't care if people talked, as long as everyone was exercising, so his class was a great time to socialize and relax between academics.