A casino is a facility where a variety of games of chance can be played. Although casinos offer a variety of luxuries, such as restaurants, free drinks, stage shows and dramatic scenery to attract players, the vast majority of their profits come from gambling activities. Some states, such as Nevada and Atlantic City, are more famous for their casinos than others. However, even in cities such as Las Vegas, the casino industry has a darker side. Some casinos are accused of contributing to gambling addictions in the area. Furthermore, some studies suggest that the net economic effect of a casino is negative because the cost of treatment for gamblers and lost productivity from them offsets any benefits.

There are three general categories of casino games: gaming machines, table games and random number games. Gaming machines are operated by computerized systems and do not involve a croupier. Table games include blackjack, craps and roulette and are conducted by a croupier or dealer. Random number games are based on the selection of random numbers by a machine or by a human.

Gambling is a dangerous activity, and casino patrons may be tempted to cheat or steal, either in collusion with each other or on their own. Because of the large amounts of money involved, casinos spend a great deal of time and effort on security. Elaborate surveillance systems often include cameras in the ceiling that monitor every table, window and doorway in a casino. They can be adjusted to focus on suspicious patrons by security workers in a separate room filled with banks of monitors.