one location of the gym I go to had such a BIG problem of guys messing around in the sauna that they changed the 'configuration' to make one wall glassed in- in essence making it a 'fish bowl' so there was zero privacy...

(the sex was waaaaay out of hand and the non-gay/bi men were really getting upset....had to agree, it was turning into a sex club not a gym (this same gym had a mirror ball in it...was was known as a 'bar with no booze and weights' so it was a catch-22)