A casino is a gambling establishment that offers games of chance and pays out winnings to patrons. Most casinos feature card games such as poker, blackjack and baccarat; dice games like craps; and wheel games such as roulette. These games require strategic thinking and decision-making skills and are often played in social groups against one another. Casinos are designed to encourage this social interaction while also creating exciting environments.

Unlike lotteries, in which players compete against others, gambling in casinos is a social activity. Traditionally, casinos were places where men and women met to drink and play cards. In modern times, however, the casino has come to be known mainly as a place where people can gamble and play other games of chance, such as roulette and slot machines.

The term casino has a specific meaning in the United States, where it refers to a facility where gambling is legal. It may be located in a city, town, or rural area. Some casinos specialize in particular games, such as baccarat and roulette. Others may have a wide variety of gaming tables and offer a full range of services, such as restaurants and bars.

Casinos have a number of built-in advantages that make it virtually impossible for anyone to win more than the casino can afford to pay out. This mathematical expectancy is known as the house edge. As a result, it is extremely rare for a casino to lose money on a game, even for just one day. This virtual assurance of gross profit allows casinos to offer big bettors extravagant inducements, such as free spectacular entertainment and luxury living quarters.