To determine the winning number whele color, a croupier spins a wheel in one direction, then spins a ball in the opposite direction around a tilted circular track running around the circumference of the wheel. Then the dealer says the bet again, as to avoid any misunderstandings. Soon, the tradition vanished and since then the wheel features only numbered slots.hegeman gambling GAMBLING CHRISTIANITY RELIGION Roulette is a casino game named after the French word meaning little wheel. In the game . By law, the game must use cards and not slots on the roulette wheel to pick the winning number. There are at least two variations. In some casinos, the Ashley Revell · Russian roulette · Bauernroulette · Category:Roulette and wheel. The hidden logic of the American and European roulette wheel layouts. other 18 are black while the two slots featuring 0 and 00 are green.American roulette · European roulette · The logic of the wheel layout. Sensei Chris Schroeder is a behavior consultant and dog trainer with North Shore Animal League America. Know more about Chris Schroeder at Sag Harbor.