A casino is an establishment for gambling. Most casinos contain a wide variety of gambling games, and some have non-gambling amenities as well. They may be integrated into hotels, resorts, restaurants, or cruise ships. In the United States, some are licensed by state governments and operate on a commercial basis. Others are nonprofit organizations regulated by the federal government.

Many casino patrons and employees may be tempted to cheat or steal, either in collusion with one another or independently. Security is thus a top priority at most casinos. The casino industry uses a number of different methods to prevent such behavior, including security cameras and staff members patrolling the floor. The security personnel are usually able to spot any blatant attempts at cheating by patrons. Table managers and pit bosses can also catch cheating by looking for patterns in betting that indicate a player is trying to influence the outcome of a game.

In the United Kingdom, a casino is a place where people play a variety of games of chance for money or other prizes. These games are often called casino games and include slots, keno, bingo, and poker. Most of these games require skill and a high degree of concentration. Some of these games can also be played for free online.

In modern usage, the term casino is broadly applied to any building or room where gambling takes place. However, some governments regulate the types of gambling allowed and prohibit certain games altogether. A casino may also be a temporary venue for specific types of entertainment, such as stage shows or musical performances.