A casino is a place where people can play games of chance for money. Modern casinos offer a wide variety of games and often include restaurants, bars, hotels, non-gambling game rooms, and more. They also employ security measures to protect patrons and keep them from cheating or gambling too much.

The word casino may refer to a particular building or collection of buildings that house gambling activities, but it can also describe any place where gambling is legal. The term is most associated with places in the United States that have been licensed and regulated by state governments, but it can also be applied to gambling houses elsewhere.

Modern casinos are complex businesses that require substantial investment and rigorous analysis to stay profitable. For example, they must be able to determine the house edge for each game they offer and track their variance (the volatility of the returns on individual bets). This is done by mathematicians who specialize in gaming analysis, and they are often employed by casinos.

In addition to traditional table games like blackjack and roulette, most casinos offer several other popular games. These include sic bo, fan-tan, and pai gow. In Asia, casinos frequently feature traditional Far Eastern games such as two-up and banca francesa. In Europe, players can find games such as boule and kalooki.

In the twenty-first century, casinos have become increasingly sophisticated in their approaches to security. Some have installed video cameras to supervise their patrons, while others use computer systems that monitor every bet made and alert them to any anomalies. In the case of slot machines, the chips have built-in microcircuitry that interacts with the machine to record exactly how much is being wagered minute by minute; and even a simple roulette wheel is wired to a central computer to quickly discover any statistical deviations from expected results.