A casino is a gambling establishment, which offers a variety of games of chance for patrons. It also features food and drink services, as well as other amenities such as hotels and shopping centers. Some casinos specialize in particular games, while others offer a broad range of gambling opportunities.

Modern casinos use sophisticated security systems to prevent cheating and other crimes. These include a high-tech “eye in the sky,” where cameras monitor every table, window and doorway. The systems can be controlled from a separate room filled with banks of security monitors. They can be adjusted to focus on suspicious patrons by security workers.

Another common security measure is the use of a system known as “chip tracking,” where betting chips with built-in microcircuitry allow a casino to monitor the exact amounts wagered on each game minute by minute, and alert security personnel to any anomalies. Computers also supervise roulette wheels and other games to discover any statistical deviation from the expected results.

A casino makes its money primarily from the millions of bets placed by its patrons. Each game has a small built-in advantage for the casino, usually less than two percent, which, when multiplied by the number of bets, generates enough income to pay for the lighted fountains, elaborate hotels and theme park attractions that make up most of a casino’s entertainment offerings. Casinos have also become a major source of revenue for American Indian reservations, which are exempt from state antigambling laws.