A casino, or gambling establishment, is a place where people pay to play games of chance. These games include poker, blackjack, craps, roulette, baccarat, and more. Casinos also offer entertainment such as stage shows, bars, and restaurants. Many states have legalized casinos, and the number is growing as more people find it acceptable to gamble.

The precise origin of gambling is unknown, but it probably began in some form long before recorded history. Ancient gaming devices like astragali (cut knuckle bones) and carved six-sided dice have been found in archaeological sites. The modern casino as an institution did not appear until the 16th century, when a gambling craze swept Europe. Italian aristocrats would hold private parties at their homes called ridotti, where they would enjoy a variety of gambling activities that were technically illegal.

Casinos make money by charging bettors a small percentage of their winnings. This is known as the house edge, and it varies from game to game. In some cases the house edge is only a few percent, but in others it can be much higher. This advantage, combined with the large number of bets placed by casino patrons, gives the casino enough revenue to build lavish hotels, fountains, towers, and replicas of famous landmarks.

The interior design of a casino is intended to give the patrons the feeling that they are entering a luxury environment. The lighting is dimmed and the carpets are lush. The overall effect is to make the patrons forget that they are still in a casino and to distract them from the fact that they are losing money.