Created in the city of Santa Rosa, CA, Rosetown (often shortened to just "Rosa") Roulette is a game played at the the ass-end of a pipe (or bong, bubbler, or any other smoking device with a bowl) session, when you can't tell if there's one solid rip left or if its just ash. If you successfully get one more toke, you win. If you get a mouthful of ash, you lose.
"I can't tell if the bowl's dusted or not... looks like we're playin' Rosetown Roulette."
by Rizdeaux Jones November 12, 2011