Any (and I do man ANY) flat horizontal surface upon which one can arrange powder cocaine or methamphetamine in lines for the purpose of snorting through a straw. Drug users are a curious lot. The same doper chick who carries hand sanitizer around in her purse will do a line off the toilet in a public restroom in a pinch.
Loserdoperchick: "Hey, I scored some powder, you got a table in here?"
Dude: "There's a CD case under your seat, but I thought I told you I didn't want that shit in my car. I've got a job and a reputation, you know? How do you afford it anyway since you're an unemployed junkie?"
Loserdoperchick: "I blew some guy in the bathroom of the last club we were in."
Dude: "Remind me why I put up with you again."
Loserdoperchick: "Because when I'm fucked up, I take it in the ass like a pornstar."