A casino is a place where people can gamble and play games of chance. Casinos usually feature a variety of gaming machines and table games such as blackjack, poker, roulette, craps, baccarat, and bingo. Some casinos also have stage shows, restaurants, and other entertainment. Casinos are generally located near or combined with hotels, resorts, and other tourist attractions. In the United States, the most famous casino is in Las Vegas, Nevada. Other notable casinos include the Monte Carlo in Monaco and the Casino Lisboa in Lisbon, both of which are known for their luxury accommodations.

A major source of revenue for casinos is the house edge, which is a statistical advantage that is built into all casino games. This advantage is small, but it can add up over millions of bets and earn casinos large profits. In addition, casinos may also generate additional revenue from the sale of drinks, cigarettes, and food to patrons.

Because so much money passes through a casino, security is a key concern. In addition to traditional security measures, many casinos use technology to prevent cheating and theft. For example, some betting chips have built-in microcircuitry to enable them to be monitored minute-by-minute; and some casino tables are electronically monitored to discover any deviation from their expected results.

Despite their high level of security, it is still possible for casino patrons to cheat and steal, either in collusion or on their own. One famous story is about a security guard who quit his job after three months because he was so disgusted by the number of patrons who stood at slot machines soiling themselves in the belief that they were on a winning streak.