I’m sure the question’s been asked before however I’m not scrolling back through every post to see.
For me it was about 35 years ago when I was dating my ex-wife, her and I were on top of a 15 story holiday inn a friend of mine worked at and gave us access to the roof. When he asked me why we wanted to go up there, we were honest with him and told him because we’ve never fucked on top of a building before.
Being a good friend he slapped me on the back unlocked the elevator and gave me the key to the roof door. I’m sure people in office building saw us, since it was literally the middle of the day
In a side room in a large church when we were both 18. There were lots of people in the building for a benefit event, so we escaped to a room that was mostly used for storing extra chairs.