dude just forge a utility document or something and fax it over to billing tell them you moved out of state, find a state without that gym.
if that does not work keep working out there, and when you go to pee in the urinal always pee beside it instead of in it, sooner or later they will know it's you, and sooner or later they will kick you out, but then you turn around and sue their asses cause you have an eye injury, just forge an eye glass prescription ro something and fax it to their CEO.