The security of a Casino begins on the casino floor where employees keep a close eye on their employees and patrons. Dealers and other employees are usually focused on their own game, but can notice if a patron is cheating. Other casino employees, called pit bosses, keep an eye on the table games. They monitor the games for suspicious patterns in betting and other behavior. Every casino employee is closely monitored by a higher-up person.

The 21st century casino has almost uniform characteristics worldwide. The European casinos became legal in the late twentieth century after almost every country changed its laws to allow casinos. The United Kingdom has licensed gambling clubs since 1960. Several famous European casinos are located in France. The casino industry has grown in popularity in recent years. However, the problem of addiction has a negative effect on the economy of many local communities. The loss of productivity due to gambling addiction offsets any economic benefit of casinos.

Technology is another aspect of modern casinos. Computers and video cameras routinely supervise casino games. Some casinos employ “chip tracking” whereby betting chips are fitted with microcircuitry. This enables the casino to monitor wagers minute-by-minute. Roulette wheels are also monitored for statistical deviations. Enclosed versions of these games do not require dealers. Instead, players push buttons to place their bets. The casinos are able to monitor the results of every bet based on their statistics.