A casino, also known as a gambling house or a gaming establishment, is a place where people can play various types of gambling games. Usually, casinos offer slot machines, table games (such as poker, blackjack, and roulette), and other entertainment shows. Some even offer food and drinks. To gamble in a casino, people must be of legal age and follow the rules and regulations set by the facility.

Casinos are often built near or combined with hotels, resorts, restaurants, retail shops, and other tourist attractions. Many states have laws regulating the type and location of casinos. Some have banned gambling completely, while others allow it only in certain areas or on Native American reservations. Many American casinos are operated by commercial enterprises, while some are run by religious organizations or charitable groups. In some cases, a casino may be operated by an individual.

Despite the widespread perception that casinos are places to lose money, most have a positive net income. This is due to the fact that, in most games, the house has a mathematical advantage over the patrons. This edge is commonly referred to as the house edge or expected value. In games that have an element of skill, the house advantage can be eliminated through careful practice or by using a strategy. In addition to this advantage, the house earns a commission on some games, which is known as the rake.

The largest casino in the world is the Venetian Macao in Macau, China. It is shaped like a birdcage and illuminated with over a million LED lights, making it one of the most iconic landmarks in the city. The hotel/casino has numerous restaurants, a spa with top-notch treatments, and thousands of slots and tables.