A casino is a facility for certain types of gambling. In the United States, casinos are licensed and regulated by state gaming control boards/commissions. They are sometimes combined with hotels and other entertainment venues. They are often located in areas renowned for tourism, such as Las Vegas and Atlantic City. Casinos are also found on American Indian reservations and in other countries around the world.

The earliest casinos were run by organized crime groups such as the Mafia, but once real estate developers and hotel chains got involved, mob influence faded. Now, the casinos are run by businessmen with very deep pockets, and security is tighter than ever. The casinos have set patterns that employees look for to spot cheating, and the way patrons react to the games is carefully monitored.

Casinos attract gamblers by offering free drinks and food. Some are decorated with bright, gaudy colors to stimulate the senses and enhance the excitement. The noise of slot machines and the clang of dropping coins creates an appealing ambiance.

Many casinos have a variety of table games, including blackjack, roulette, and poker. Some have a Far Eastern flavor, with games such as sic bo, fan-tan, and pai gow. Usually, these tables are located in separate rooms from the main floor. The higher stakes gamblers are called “high rollers,” and they are rewarded with comps, which include free hotel rooms, meals, shows, and even limo service. These high rollers make up the bulk of casino profits, and are watched closely by security.