A casino is a gambling establishment where people can place wagers on games of chance. The games include slot machines, table games such as blackjack and roulette, and card games such as poker. The establishments also offer food and drinks. The gambling operations are regulated by law. In the United States, there are many casinos. The largest concentration of them is in Nevada and Atlantic City.

Casinos make money by giving patrons a statistical advantage over other players. This edge can be a small amount, such as less than two percent of the money that is bet on a particular game. But the advantage adds up over millions of bets. It gives the casino a virtual assurance of gross profit and allows it to invest in elaborate hotel towers, fountains, pyramids and replicas of famous landmarks.

In the twentieth century, several states legalized casinos, and some even established their own versions of Las Vegas. Most casinos are run by major hotel chains and real estate investors who have deeper pockets than the mob, which was once an important force in casino ownership.

While musical shows, lighted fountains and shopping centers draw in tourists, the bulk of a casino’s profits come from its gambling operation. In order to attract and keep high rollers, the establishment offers them extravagant inducements such as free spectacular entertainment, reduced-fare transportation and elegant living quarters. Casinos must be careful to stay away from the kind of corruption that can tarnish their reputation and hurt their bottom line. Besides cameras, they employ a variety of other security measures. They also train their employees to spot suspicious behavior, such as a player holding cards up in front of his face.