The roulette game as we know it originated in 1796 in Paris and was designed to have a house edge which would return a percentage profit to the casino. Bets can be placed on a single number, or a variety of different combinations, all of which offer different chances and payouts. These games can be played at walk-in casinos or at onlineīefore each turn, bets are placed on which number the ball will land on. For each turn, the wheel is set spinning in one direction and a ball is launched in the opposite direction. Roulette is played on a spinning wheel which has either 37 or 38 numbered pockets. Roulette Rules, Odds, Chances and Payouts.