There are three types of roulette: Single zero (0) roulette, also called European Roulette, double zero (00) roulette, also called American Roulette, and the much less common triple zero (000). The player odds corresponds directly to the number of zeroes on the wheel. A single zero wheel has a house edge of 2.7%, a double zero wheel has an 5.3% edge and the triple zero wheel has 7.7% house edge.