A casino, or gaming house, is a place where people can gamble on games of chance, and in some cases with skill. Most casino games have a built in long term disadvantage for the house, which can be a small percentage or a large one (depending on the rules and game played). Casinos make money from these built in advantages by taking a percentage of all bets made by patrons, which is also known as the vig or rake. Players who can use a system of basic strategy to eliminate this advantage are called advantage players and can win big sums.

In addition to the vig, casinos rely on other sources of income. For example, slot machines and video poker machines generate a significant portion of casino income because they are easy to play and can be adjusted for any desired profit. Casinos also attract tourists who spend money on rooms, entertainment and other gambling activities, but these income streams are not as consistent as a vig.

Casinos are found worldwide and are operated by a variety of entities. Some are run by state governments, while others are owned and operated by private businesses or religious organizations. They can be found in cities, on Native American reservations, and in countries across the world. They typically offer a variety of casino games and are supervised by trained personnel. They are often designed with an eye to appeal to a broad range of customers, and include amenities such as restaurants, bars, theaters and shopping areas.