The Wharf Rats are a group of concert goers who have chosen to live drug and alcoholic free. They arose out of the environment around the rock group the Grateful Dead.The yellow balloon group have branched out to many other sober concert goers community's. The Yellow balloon Movement, Fellowship(Phish) Jellyfish( String Cheese Incident) Gateway ( Widespread Panic) The dusty baggers (Billy Strings) Stand Together Music