In a building about 3 floors up in a lit window in the main shopping street in my city - during the Christmas rush. It was late night shopping, and I expect the window was in a storeroom or something. The couple obviously didn’t realise hundreds of passersby could see them having sex standing up.
When they finished they saw us all laughing and pointing and scuttled back into the darkness…
When I first joined my gym, I didn’t know you had to have special gym-only shoes. I walked in to sign up with only my regular office shoes. That was no good, because the gym folks wanted to give me a fitness evaluation, and for that I had to have gym shoes to use the equipment.
I was all set to come back another day, with proper shoes, when the guy I was talking with said maybe that he could give me a loaner pair from the lost-articles stock. This was kept in a little storage room in a remote part of the gym. I trooped over there with him.
He put the key in the lock and then said, “that’s funny, it isn’t locked”. Then he opened the door …
… and inside was a guy I later learned was the boxing instructor (he was a good looking and of course very muscular fellow) standing there, getting a blowjob from one of the gym’s patrons kneeling in front of him.
There was an uncomfortable moment. We stood there. She sort of froze, like if she didn’t move, perhaps we wouldn’t notice that she had his cock in her mouth. They both had that frightened-deer-in-headlights look … then the guy I was with muttered something like “excuse us” and closed the door.
We agreed to schedule the fitness test for the next week.
That’s one hell of a fitness test.
Oh yeah, there are plenty of things after the fact I wish I’d said at the time. 
“If that’s the test, why do I need special shoes?”
A park bench on Subbase Point Loma, San Diego. :: shudder ::
In the Pipe-Fitters shop on board the USS Dixon (how appropriate!).
In the Oil and Water Lab on the USS Dixon (also oddly appropriate).
I don’t think it’s appropriate. Those things don’t mix.
That’s rather impressive. Wheels, seriously? I’d break an arm. Kids these days!