Another strange place was a theatre costume room, while we were crew during live performances!
We both were running sound in one of 3 separate but connecting booths at the back of the theatre. They were for lighting; for follow spot lights & film projectors in the center booth; and sound in the third.
We usually worked with our sound door closed, which opened into the middle projection booth, and normally no one would enter during the show. But there were long gaps in the production when we had no sound cues to perform, which were all sound effects like cars driving up and such, giving us nothing to do for quite a while. (It was a production of "Picnic" BTW)
In the sound booth was a metal ladder on the wall which went up into one of the catwalks that crisscrossed above the false ceiling over the house. So we'd climb out of the booth and make our way towards the stage, passing the open coves through the ceiling where the lighting instruments were hung, able to catch glimpses of the actors on stage as we walked above the audience.
We'd arrive in the backstage flyspace, high up among the hanging electrics and curtains, where a metal spiral staircase took us 15 feet down to another catwalk that led through the backstage brick wall. There, in the 2-story backstage construction area we'd enter into ordinary hallways.
Our destination was the costume construction shop, always dark & deserted during a performance. Our fun was played out on cutting tables, and buried in mountains of fanciful costumes piled & hung everywhere. It seemed the perfect place for a gay romp.
I checked my wristwatch often, knowing the pace of the show, and we never failed to return to the booth in time to take our next sound cue. Gawd, life was good, that I got to do 2 of my favorite things at the same time: theatre & fucking! LOL!!!