My favorite place on campus is: Recreation and Physical Activity Center (RPAC)
The RPAC is a very fun place. I usually get at least two hours a day doing physical activities and sports such as basketball, ping-pong, tennis and so on. Sundays I play soccer in the playground outside.
The infrastructure of the RPAC is huge and has many professionals serving students, as well as various activities such as competitions and fight classes.
http://library.osu.edu/buckeye-stroll/uploads/location_image/2010_rpac.jpg
you chose a good place
good luck