Buy in for $100, immediately put $20 in your pocket, stare at the wheel, order a drink, ask for a score card & a pencil, scribble a few things down as if your really going to place a bet, wait for a shift change, & then ask the dealer, "When is that darn Keno runner going to come by to pick up my slip." When he or she tells you that you're at the roulette wheel, mutter under your breath, cash in the $80 & walk with the $20.