That sounds SO awesome! I didn't know any action went on there! (In those showers)
One place is the Heartly-Teakle (Ag) building... down near the multilevel carparks. Level 1 toilets - near the lift. (Upstairs from disabled ones) or even higher on Level 5.
Michie Building (off the great court) use to have something - but it's too busy and not altogether good. There are so many 'quiet' areas - places should be arranged!