A casino is a building or room where gambling games are played. People who visit a casino play a variety of games of chance, including poker, roulette, blackjack, and more. Many casinos have restaurants, kid zones, and stage shows. Some have hotel rooms and limo service, too. Some are open 24/7. The games at a casino are often based on luck or skill, and most players have a positive experience. However, compulsive gamblers can cause problems for other patrons and may even steal from the casino.
For most of American history, gambling was illegal in most places. Even after the legalization of casino gambling in Nevada in 1931, it took decades for casinos to grow into a legitimate industry outside the state. This was due to the fact that legitimate businessmen were reluctant to invest in such a seamy venture, and organized crime figures had plenty of cash from drug dealing and extortion.
As casino gambling expanded in the twentieth century, owners became more choosy about who they allowed to gamble on their premises. They focused their investments on high rollers, offering them extravagant inducements to gamble in special rooms with very high stakes. These high rollers were able to make enough money that they could afford luxury living quarters, limo service, and airline tickets.
Modern casinos use technology to monitor games as well as their patrons. Video cameras keep an eye on the action, and computers supervise betting chips with built-in microcircuitry; roulette wheels are electronically monitored to detect any statistical deviation from their expected results. Security staff also watch for a wide range of subtle behaviors, such as how dealers shuffle cards and where patrons place their bets on table games, to identify cheating or collusion.