A casino is a place where people can play games of chance. It may include table games and slot machines, but it also may have other types of gambling entertainment. Its customers gamble by placing wagers, and the house takes a percentage of the money wagered, known as the rake. Casinos usually add luxuries to attract customers, such as restaurants and free drinks, but the vast majority of their profits are derived from gambling.

Casinos can be built near or combined with hotels, resorts, restaurants, shopping centers and other tourist attractions. In the United States, the Bellagio hotel and casino in Las Vegas is perhaps the best-known example of a high-end casino. It was a favorite of the mafia, but mob influence faded in the 1950s when legitimate businessmen with much deeper pockets bought out the casino owners and took sole or partial ownership.

In the twenty-first century, casinos are choosier about whom they welcome. They make their money primarily from the highest-stakes gamblers, who are called high rollers. They are often allowed to gamble in special rooms away from the main floor, where the stakes can be in the tens of thousands of dollars. In exchange for their large bets, they are given free room and show tickets, and sometimes even limo service and airline tickets. Casinos use technology to supervise their games. For instance, chip tracking allows the casinos to know exactly how many chips are placed at a time and quickly discover any deviation from expected results.

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