This announcement usually comes when the wheelhead and the ball begin to decelerate. Roulette is a game played on a spinning wheel with numbered pockets and a small ball. Players place bets on the desk, predicting where the ball will land when the wheel involves a cease. The two primary variations of roulette are American roulette, which has a wheel with 38 pockets, and European roulette, which has 37 pockets.