A croupier or dealer is someone appointed at a gambling table to assist in the conduct of the game, especially in the distribution of bets and payouts.

The house edge on an American roulette wheel, which contains a double zero, is 5.26%. 2 For everyR$1 million that's bet at the roulette tables in a casino, the management expects to pocket a profit of slightly more thanR$50,000. The other approximatelyR$950,000 is returned to the bettors.

As mentioned above, Casino is based on Nicholas Pileggi's nonfiction book about Frank Lefty  Rosenthal, and what led Pileggi to write about him was a 1980 report about a domestic argument between Rosenthal and his wife, Geri McGee (played in Casino by Sharon Stone).