A casino is a place where people can gamble and play games of chance. There are more than 3,000 casinos worldwide, including the world-famous Las Vegas Strip and downtown casinos. Casinos also exist outside of Nevada on American Indian reservations and other sites not subject to state antigambling laws.

Gambling in a casino is often very noisy and the atmosphere is designed around noise, light, and excitement. The game rooms are often very large and have high ceilings to maximize the effect of sound. Players shout encouragement to one another and waiters circulating with alcoholic drinks provide service to patrons. Nonalcoholic beverages are often available free of charge.

All casino games have a built in advantage for the house, which is usually lower than two percent. This is known as the house edge or vig, and it is how casinos make money. The house edge is not something that gamblers can control, but they can manage their own bankroll to minimize losses and maximize gains.

To encourage customers to spend more money, casino staff reward loyal players with perks called “comps.” These include discounted or free hotel room rates, meals, and show tickets. High-rollers receive additional perks such as airline tickets, car service, and even luxury suites. Casinos often hire security personnel to watch over the tables and patrons to prevent cheating, such as marking cards or palming chips. Casino workers also keep their eyes peeled for shady characters who might try to steal money from the house.