RV Parks, resorts, state parks, parking lots. But this was a first. 
We were inside a box (our motorhome), inside a box (a shop). Kind of like a set of Russian dolls. We spent the night there. The air conditioners on our roof had reached the end of their useful life. (They’ve been used a lot since 2005, and besides, they spent about ten winters parked in the salt air on the beach. That led to some serious corrosion on the aluminum fins.) We’re getting new ones on. They should be good for another fifteen years or so.
We were inside a box (our motorhome), inside a box (a shop). Kind of like a set of Russian dolls. We spent the night there. The air conditioners on our roof had reached the end of their useful life. (They’ve been used a lot since 2005, and besides, they spent about ten winters parked in the salt air on the beach. That led to some serious corrosion on the aluminum fins.) We’re getting new ones on. They should be good for another fifteen years or so.