When discussing roulette odds you should understand that there are two different types of roulette games offered and each has its own unique house advantage against the player. As the ball loses strength, it will pass through an area of ​​deflectors, fall on the steering wheel and enter one of the 37 or 38 spaces, depending on whether the roulette’s style is American with zero (0) and double zero (00), or European with only one zero (0).