A casino, also known as a gambling establishment or gaming hall, is a place where people can gamble on games of chance. Some casinos may offer additional amusements such as a stage show or luxury accommodations.

A patron of a casino can only win money by having more than the casino’s initial investment. Consequently, it is virtually impossible for a casino to lose money on its games. This mathematical expectancy is referred to as the house edge, and it can be calculated by a game’s rules and payout percentage. Casinos often give out complimentary items, known as comps, to attract and retain patrons, such as free drinks or food. They also charge a commission, or rake, for card games that involve betting among players.

Casinos rely on psychological tricks and marketing strategies to encourage patrons to gamble. For example, they arrange the slot machines and tables in a mazelike pattern that keeps people wandering through the casino. They play background music and use electronic lighting to create an opulent, upscale atmosphere. In addition, they have trained employees to greet patrons, answer questions, and recommend games. They can also discourage cheating by offering a variety of security measures, such as cameras and escorts. However, patrons can still cheat and steal, either independently or in collusion with a crooked employee. They can also try their hand at poker, baccarat, and other table games that require skill. The best-known casino is the Bellagio in Las Vegas, but there are many more famous ones around the world, including Monte Carlo in Monaco, Casino de Lisboa in Lisbon, and Casino Baden-Baden in Germany.