Not craps or roulette (without cheating), but certainly with blackjack. By finding favorable conditions and counting cards, it's possible to extract a slight a

Not craps or roulette (without cheating), but certainly with blackjack. By finding favorable conditions and counting cards, it's possible to extract a slight advantage over the house (say 1% edge). Of course this is a grueling enterprise with an extremely high variance and thus requiring a large amount of capital.