A casino (or gaming hall) is an establishment offering a variety of gambling activities. These facilities are often combined with hotels, restaurants, retail shops, cruise ships, or other tourist attractions. Casinos can also host live entertainment events such as stand-up comedy, concerts, or sports. The term casino can also refer to a small group of private clubs, where members enjoy socializing and gambling. In the United States, the most famous casinos are located in Las Vegas, Nevada, but many states have legalized their own casinos, with several hundred more in the process of being built.

Gambling in some form is believed to predate recorded history, with primitive proto-dice and carved knuckle bones found in archaeological digs, but the modern casino as an institution for the organization and management of gambling did not appear until the 16th century, with a rise in popularity of the games in Europe during that time. The idea was to gather all the various ways to gamble under one roof for the convenience of visitors and to capitalize on the gambling craze.

Historically, a large percentage of the profits from a casino were made by table games like blackjack and poker, which require some degree of skill, but today’s casinos rely primarily on slot machines for their incomes. They rely on their mathematically determined house edge to assure a profit and keep the patrons coming back for more.

The interior design of a casino is usually meant to create a sense of luxury and style. For example, lush carpeting and richly tiled hallways are common features. Windows are seldom used, and clocks are not displayed, so that patrons can be absorbed in their gambling and lose track of the passage of time.