Roulette (Taken from the French word for "small wheel"). Involves a round roulette wheel which has 37 or 38 separately numbered pockets in which a ball must land. The main pockets are numbered from 1 to 36 and alternate between red and black, with number 1 being red. There is also a green pocket numbered 0. Depending on the casino site you use, there may be another green pocket numbered 00.
If a player bets on a single number and wins, the pay out is 35 to 1. The bet itself is returned, so in total it is multiplied by 36. A player can bet on numbers, combinations, ranges, odds/evens, and colors, the odds getting progressively less.