A casino is a place where people gamble on games of chance or skill. These games may be played at tabletop game stations conducted by live dealers, or on mechanical devices such as roulette wheels and slot machines. Some casinos host poker tournaments and blackjack games. The casino industry generates billions of dollars annually for the companies, investors, and Native American tribes that own and operate them. It also draws tourists to gambling destinations.

In recent years, a number of new technologies have improved the security and reliability of casino operations. For example, in a game of blackjack, betting chips with built-in microcircuitry enable the casino to monitor exactly how much money is wagered minute by minute; and roulette wheels are monitored electronically so that any statistical deviation from expected results can be quickly detected. In addition, casino employees are trained to spot cheating or stealing.

Despite their many advantages, casinos are not without controversy. Some critics argue that they encourage reckless spending and contribute to addiction. Others contend that they increase the risk of gambling-related problems among young people. In addition, the large amount of cash handled within a casino creates opportunities for cheating and theft. Because of these dangers, casinos spend considerable time and money on security. Moreover, something about gambling (perhaps the promise of quick riches) seems to inspire people to try to cheat or steal, whether in collusion with others or on their own. These ill-intentioned activities lead to expensive security measures, which often include video cameras.