Some years ago, there used to be a S&M club in the building next to the Bond St. Dojo in NYC. One night after class, one of the instructors was tossing some zealots around when we heard a light knocking on the door. Someone opened the door and this very skinny guy pokes his head inside and asks "Is this the S&M club?". Without missing a beat, Ken sensei calls off the mat to the guy "No, but c'mon in! We'll give you a drink and beat you up for free!"