Casino is a large gambling establishment that offers a variety of games. It also provides other facilities such as restaurants and bars, and is a popular tourist attraction. Casinos are often referred to as gaming houses or gambling halls, and they can be found in many cities around the world. In the United States, casinos are most prominent in Las Vegas, Nevada; they are also located in Atlantic City, New Jersey; Reno, Nevada; and Biloxi, Mississippi. Other major casinos are in Estoril, Portugal; Corfu, Greece; and Baden-Baden and Bad Homburg von der Hohe, Germany.

Most casino games have mathematically determined odds that give the house an advantage over the players. This advantage is referred to as the house edge or expected value. Casinos hire mathematicians and computer programmers to analyze the results of individual games and determine how much cash to keep in reserve for payouts. These experts are referred to as gaming mathematicians and game analysts.

Most casinos offer a wide range of table and slot games. They may have one or more poker rooms where professional players compete in high stakes games. Other popular casino games include craps, roulette, baccarat, and blackjack. Some casinos also have traditional Far Eastern games such as sic bo, fan-tan, and pai gow. These games are also popular at Asian restaurants and in school competitions. Many casinos also have video poker machines that pay out a percentage of the total amount wagered on each spin.