A casino is a building or large room in which people gamble by playing games of chance or skill. Gambling is done with cash or other objects of value, and players win or lose according to the odds of each game. The term casino may also refer to a specific game, such as blackjack or poker. The gambling industry is regulated by law in many jurisdictions. Casinos are usually located in cities with a high population of tourists or business travelers. They are also found on some American Indian reservations, which are exempt from state laws prohibiting casinos.

In the United States, the first legal casino was opened in Atlantic City in 1978. Since then, casinos have spread to many other locations, including a number of American Indian reservations. Many of these casinos are supervised by the local government, and most have hotel rooms. The casinos employ a combination of physical and specialized security forces to prevent criminal activity, as well as an electronic surveillance system that monitors patron behavior.

While the majority of casino action takes place on the floor, a top casino offers much more than just the latest slots and table games. The most prestigious casinos in the world offer a unique and wholesome experience, from elegant spas to world-class restaurants. Some travel the world specifically to visit them, while others stumble upon them by chance and find themselves engulfed in the sound of the clinking of slot machines and shuffling of cards.