Casino is a gambling establishment where customers gamble with cash or casino chips on games of chance, sometimes with an element of skill. Most games have a mathematically determined house advantage, which the casino earns through a commission or rake. The best-known examples of these games are blackjack, roulette, craps and baccarat. Some casinos also offer poker, where patrons play against each other, and the casino makes money by taking a percentage of the pot or charging an hourly fee.

Modern casinos use technology to make the gaming experience more immersive and exciting for their customers. For example, some have video cameras that monitor the games themselves and alert security to any suspicious activity. In addition, some have chip tracking systems that enable the casino to oversee the exact amount of money wagered minute by minute. Other innovations include roulette wheels that are electronically monitored to discover any statistical deviations from expected results.

Some casinos use scented air to create an atmosphere that encourages people to stay longer and spend more money. The scent is wafted through ventilation systems, and it can mask unpleasant odors or even add a pleasant scent. Other casinos play music to create a euphoric environment that can encourage players to gamble more and keep coming back. For example, some studies have shown that people gamble 45% more when they listen to low-tempo music than high-tempo music.