I'd like to try this sometime: Werewolf, a.k.a. Mafia. It's a party game, a kind of Diplomacy without the map or the armies or the fleets; instead of conquering Europe, you just have to save your paranoid little village from the werewolves. Or eat the paranoid little village before you get lynched -- one or the other.
I suspect I would suck, but I still want to try it.
From a reference by Scott Rosenberg.