A casino is a building or large room used for gambling. It contains a number of gaming tables and is staffed by casino employees known as croupiers. The games played in a casino are based on chance and skill. Some casinos have bar areas where patrons may drink and socialize. Most of the modern casinos in the United States are built around a themed concept. For example, the Caesars Palace in Las Vegas is designed to evoke Roman majesty and has hosted many famous entertainers such as Frank Sinatra.

Gambling has been a part of human civilization for millennia. Evidence of dice was found in China as early as 2300 BC, and playing cards appeared in Europe in the 1400s. Casinos have become a major form of entertainment and are found all over the world. They offer a variety of games, including slots, table games, and card games. Some of the more popular games are roulette, blackjack, and poker.

The casino industry has a significant impact on the economy of cities and regions in which they are located. Its revenues have helped to revitalize some formerly downtrodden urban centers. It also has stimulated tourism in areas that otherwise would not have attracted visitors. Casinos often compete with each other to attract gamblers by offering special inducements such as free or reduced-fare transportation, hotel rooms, and luxurious entertainment.

Casinos must protect their patrons from cheating and theft, which can occur both in collusion between players or between patrons and casino staff. Security measures include cameras and other electronic monitoring. In addition, some casinos use technology to supervise the games themselves. For instance, some betting chips have microcircuitry that interacts with systems in the table games to allow the casino to oversee the exact amounts being wagered minute by minute, and roulette wheels are electronically monitored regularly to discover any statistical deviation from their expected results.