Roulette
Play Roulette at casinos offering the “en prison” rule on even-money bets. When 0 comes up, your bet remains or is "captured" for the next spin. If you then lose or another 0 is spun you lose your money. If you win, you get your bet returned. This reduces the casino house edge to 1.35%. For simplicity, some casinos simply pay 50% of the bet back to the player if a 0 is spun. On every other Roulette bet the odds in favour of the house are 2.7%.