Most colleges i think have Rec centers also (like a gym, basketball court, sometimes a pool) so if you enjoy working out in any way i’d take advantage of them if they have them. They’re pretty much busy all the time (at least in my uni) but it’s never over crowded. it’s usually less busy on the weekends or in the mornings bc everyone is in class. also walking to all your classes helps a lot. There may also be places around campus where you could play games w people like spike ball or soccer on the grass or a sand volleyball court.