A casino, also known as a gaming establishment, is a place where people can gamble. Most casinos offer a variety of gambling games, including poker, blackjack, and roulette. Some casinos also have sports books and racetracks. Gambling has a long history and is practiced in most societies. The precise origin of gambling is unknown, but it has been found in many cultures throughout the world.

Casinos are a major source of revenue for some states and cities. The biggest gambling destinations include Las Vegas, Atlantic City, and Chicago. Many casinos are upscale and offer high-end amenities such as hotels, spas, and restaurants. Some casinos also feature entertainment shows and celebrity performers.

In the United States, there are more than 1,000 casinos. These are usually licensed by state governments and operate with strict regulations. Most of the larger casinos are located in cities with large populations and high tourism levels. Some casinos are operated by Native American tribes, and some are private corporations. Most casinos are staffed by trained employees. Some casinos use security cameras, but most rely on trained staff to prevent cheating and other violations.

Casinos are divided into three main categories: gaming machines, table games, and random number games. Gaming machines are mainly mechanical devices that display symbols or images and are operated by a dealer or automated system. Table games are played against the house, primarily by one or more live dealers. These may include card games such as baccarat and blackjack, or dice games such as craps. Some casinos also feature Far Eastern games such as sic bo and fan-tan.