What Is a Casino?


A casino is a building or room where gambling games are played. Its essential features are a gaming floor, tables and chairs, and a large number of slot machines. Many casinos also feature restaurants, free drinks and stage shows. Some are themed, such as the Bellegio, which is famous for its dancing fountains.

Gambling in some form has existed since ancient times. Modern casinos, however, have become increasingly opulent, with many including hotels, spas, restaurants and nightclubs. Most have extensive security, with cameras constantly monitoring patrons. Some have more high-tech “eyes in the sky” systems that allow security workers to zoom in on suspicious patrons from a central control room.

Most casinos have a built-in advantage for the house, which is determined by the mathematical probabilities of each game and can vary from one game to the next. This advantage, called the house edge or vig, helps the casino make money and offsets losses from those who don’t win.

Something about gambling seems to encourage people to cheat or steal to try to gain an edge. This is why casinos spend so much time, effort and money on security. Dealers have their eyes glued to their table and can easily spot blatant cheating like palming cards or marking dice. Pit bosses and table managers have a broader view of the casino’s patrons and can watch for betting patterns that might signal cheating.

Casinos can be found in most states that legalize gambling, as well as several countries worldwide. In the United States, the first major casinos opened in Atlantic City in 1978 and were soon followed by casinos on American Indian reservations, which are exempt from state antigambling laws.