A casino is a place where people can gamble by playing games of chance for real money. Some casinos also offer food and drinks. The casino industry is regulated by gambling laws. Casinos are usually owned by large companies and have a wide variety of entertainment options available for their guests.

Many casinos are designed as themed environments, with architecture and décor reminiscent of a particular region or country. For example, the Bellagio casino in Las Vegas is modeled after a European castle. The Monte-Carlo casino is a famous landmark and has long been a source of income for the principality of Monaco. Other notable casino locations include the Palace of Windsor in England and the Empire at Leicester Square in London.

Casinos make their money by taking a percentage of all bets made by patrons. The exact amount varies from game to game and is known as the house edge or vig. The casino advantage can be small, less than two percent, but over millions of bets it adds up. The house edge is balanced by the payout percentages set for each machine or table game. These numbers are calculated by professional mathematicians and computer programmers called gaming mathematicians and analysts.

Because large amounts of money are handled in a casino, staff and patrons may be tempted to cheat or steal. Security measures include cameras and video surveillance, as well as a highly trained staff to spot any suspicious behavior. In addition to the obvious blatant violations of casino rules, there are subtle cues that can indicate cheating, such as the way a dealer shuffles or deals cards and the patterns of betting on certain tables.