A casino is an establishment for certain types of gambling. The largest casinos in the world offer high-limit gambling rooms, luxury suites, fine dining and entertainment venues. Some casinos also have golf courses and luxury spas. They may be located in or near hotels, restaurants, retail shops or cruise ships. Some casinos are owned and operated by governments or local or regional businesses. Some casinos specialize in specific types of games, such as baccarat or craps.

Generally, casinos are highly profitable enterprises. They are able to maintain their profit margins because each game offers the house a mathematical expectancy of winning, although this varies by game. For example, the house edge in keno is higher than in roulette or blackjack.

In modern casinos, technology is frequently employed to ensure that the games are fair. For instance, chips with built-in microcircuits allow the casinos to monitor how much money is being wagered minute by minute, and they can detect any statistical deviation as soon as it occurs. Casinos are also wired to allow electronic monitoring of roulette wheels to alert them immediately if the numbers do not fall within expected ranges.

In the United States, Las Vegas is famous for its world-class casinos. In addition, a large number of gambling establishments can be found in the state of Oklahoma. Some of these are located in the WinStar World Casino and Resort, which is a joint venture between the City of Oklahoma and the Chickasaw Nation.