The two types of roulette wheels: European Single 0, and American Double 0 The European wheel has 37 pockets. a roulette table is known as the layout. The layout is either single zero or double zero. The European style layout has a. American and European Roulette wheel layouts showing the various numbers on the roulette wheels. The difference is that the European Roulette table has one. In many jurisdictions most notably the United Kingdom this is considered gambling on credit and is illegal in some jurisdictions around the world. The double-dozen bet version uses two dozen bets and half the stake list size of the single-dozen-bet version. The description included the house pockets, "There are exactly two slots reserved for the bank, whence it derives its sole mathematical advantage. Shown in the picture. The American game developed in the gambling dens across the katz und maus spiel online territories where makeshift games had been set up, whereas the French game evolved with style and leisure in Monte Carlo.