So... I haven't posted here in 3-4 years, wow!

Anyways, I'm 23 and my girlfriend (23) and I both live at home with the parents (just finished University, so that will end soon lol). We've been getting it on in the backseat of my car but are finding it a little cramped. So I'm thinking about where we can have sex, and a hotel/motel option came to mind. I was just wondering what the hotel etiquette is for just getting a room for the evening. Like, do they want you to stay the entire night? Is it common to get a hotel room just to fuck around? Do you need to indicate anything to them when you purchase the room? Or you just purchase a room for the night like usual and leave whenever you want?

Hope this dosen't sound completely retarded lol. If you have a better suggestion for a place to have sex with a BED then let me know lol.