A casino is a gambling establishment, where various games of chance are played. It is a popular place with people from all over the world who come to play and win money. Casinos also offer restaurants, hotels and other amenities. Casinos have been featured in many movies and are a major source of income for some countries.

Although casinos often have lavish luxuries such as stage shows and dramatic scenery, they are most famous for the billions of dollars in profit they make from gambling. Slot machines, black jack, roulette, craps and other table games account for most of this profit.

In order to protect their profits, casinos employ a variety of security measures. These range from cameras to sophisticated electronic systems that supervise the games themselves. For example, in some cases betting chips have built-in microcircuitry that monitors and tracks the amounts wagered minute by minute; and roulette wheels are monitored regularly for statistical deviations from expected results.

Because every game has a built-in advantage for the casino, it is very rare for a patron to win more than they lose at a casino. Even so, some gamblers do become very rich, and their winnings can pay for expensive vacations, houses and other luxury items. Because of this, casinos frequently offer big bettors extravagant inducements such as free spectacular entertainment and transportation, hotel rooms, reduced-fare hotel rooms and other perks. They also give out a variety of free drinks and cigarettes while patrons are gambling, and enforce rules of behavior such as keeping a poker face or not speaking while playing.