Places not to have sex. Lol

I sat in an old movie theatre with old canvas seating. A girl and a guy in the row in front of me. We were all standing for the national anthem. AS she sat down the girl in front slipped her knickers off. She worked her way onto his lap and sat on his cock for most of the movie. "Leave it in me" she said.
At derive in theaters (I don't know the US term) people would park their panel vans, with the back hatch door open and a mattress in the back. Some times, when walking back to the refreshment bar, one could see the old 'ten toes up, ten toes down" thing happening.