A casino is a gambling establishment that offers a variety of games of chance for players. These include poker, blackjack, craps, roulette, and video slots. Some casinos also have sports books and racetracks. Casinos are regulated by the laws of the country in which they operate. Some countries prohibit them entirely, while others regulate them to some extent. In the United States, casinos must be licensed and supervised by state governments. In addition, the federal government regulates some forms of gambling.

The first casino was founded in the 16th century, when a gambling craze swept Europe. The idea of a place where gamblers could find a variety of different ways to gamble under one roof was revolutionary. Until then, most gambling took place in private clubs known as ridotti.

Unlike other forms of gambling, which rely primarily on luck, most casino games have an element of skill and can be controlled by the players. Nevertheless, the overall mathematical expectancy of winning a game is negative for players, and the house has an edge over them. This advantage is called the house edge, and it is built into the rules of most games.

Casinos use many tricks to attract gamblers and keep them gambling. For example, they often feature bright and sometimes gaudy floor and wall coverings that stimulate the sense of sight and encourage people to gamble more. They also employ a variety of noisemakers and other mechanical devices to create a lively atmosphere. The sound of clinking coins and the shuffling of cards is particularly effective. To keep the patrons occupied, casino employees offer drinks and snacks at minimal cost. They may even give out complimentary items, or comps, to big gamblers.