A casino (also known as a gambling house, and in some cases a gaming hall) is an establishment for certain types of gambling. Most casinos are open to the public and offer a variety of games, such as poker, blackjack, and roulette. They also feature food and beverage services, as well as entertainment options like shows or concerts. Many casinos also have hotel facilities.

The modern casino is a highly sophisticated business that requires substantial capital and skill to operate successfully. Its operations are regulated by law, and it is a major source of income for many cities and states. The casino industry is also a significant employer, with more than 14 million people employed by casinos in the United States.

Despite the glamorous images associated with casino gambling, the industry has its share of problems. Casino security is an important element, and it involves a wide range of tactics. For example, surveillance cameras and a team of trained personnel monitor the activities of casino patrons to ensure that the rules are followed. There are also more subtle ways to prevent cheating, such as observing betting patterns that might suggest that someone is trying to steal chips or manipulate cards.

Gambling probably existed as early as recorded history, with primitive protodice and carved six-sided dice found in archaeological sites. However, the casino as a place where gamblers could find various forms of gambling under one roof did not develop until the 16th century.