A casino is a gambling establishment that offers a variety of games of chance and skill, as well as other types of entertainment. Some casinos also offer hotel rooms and other amenities. The largest casino in the world is in Las Vegas, Nevada, although there are casinos in many other locations, including Atlantic City, New Jersey, and on American Indian reservations.

Casinos make money by taking advantage of the fact that most games have a built in statistical advantage for them, which they call their house edge. While this advantage is small, it accumulates over millions of bets, enough to earn a casino a substantial gross profit. This is how they can afford to build their elaborate hotels, fountains and replicas of famous landmarks.

The large amounts of currency handled by a casino attract both patrons and employees who may be tempted to cheat or steal, either in collusion or independently. To prevent this, most casinos use a variety of security measures. These can range from simple cameras to elaborate eye-in-the-sky surveillance systems that monitor every table, window and doorway of a casino at once.

Casinos often reward large bettors with free or reduced-fare transportation, rooms and show tickets. They also give comps, or complimentary goods and services, to players who spend a lot of time at their tables or slot machines. Comps can include anything from free drinks to free hotel rooms and meals. This is an attempt to increase the amount of money gamblers bring to the casino and attract more visitors.