Roulette is one of the easiest games to play and understand in the casino. A U.S. roulette wheel consists of 38 numbered slots: numbers 1 to 36, a zero, and a double zero. The betting layout consists of every individual number as well as a host of "outside" bets on combinations of numbers, or simply red or black. After the players make their bets, the dealer spins the wheel and a ball and after several seconds the ball will land in one of the numbered slots.