Obviously you have to go to Quads and squat with coan.
this if you're staying downtown.
a little farther up north is this place:
http://www.bwgym.info/quads is catering a little more to twinks now because it's close to boystown and the "i'm just out of college partying it up while my parents foot the bill" crowd.
b&w gym - you might get stabbed.
nice place, couple locations, hot chicks go in there:
http://www.cheetahgym.com/and not sure if equinox gyms have one day passes, but those are creme de la creme of gyms around here.