A casino is a gambling establishment, which houses various gambling games. It may also offer other entertainment such as live entertainment, restaurants, and retail shops. Some casinos are combined with hotels, resorts, or other tourist attractions. Many countries legalize and regulate the operations of casinos. In the United States, there are over 1,000 casinos.
Casinos earn their profits from the house edge built into the rules of each game, which can be as low as two percent for games such as roulette and baccarat. Casinos attract patrons by advertising this advantage and by building elaborate hotel casinos, fountains, towers, and replicas of famous landmarks, such as the Eiffel Tower and the Taj Mahal.
Table games are played by croupiers, also known as dealers. They supervise each table and keep track of the money wagered. They can spot blatant cheating such as palming, marking, or switching cards and dice. Dealers wear gloves to prevent germs from being transferred to the customers. In addition, each table has a “higher-up” supervisor who monitors the entire floor and watches for betting patterns that suggest cheating.
In games with a skill element, the casino may earn additional revenue by charging a commission, called a rake, to poker players. The rake is a percentage of each pot that the casino takes at the end of each hand. This varies according to the game and even the number of decks used in each hand. Casinos often hire mathematicians to calculate the house edges and variance of each game.