A casino is a place where gambling activities take place. It may also refer to a group of gaming rooms, or a collection of machines for playing games such as poker and roulette. Casinos are usually located in tourist destinations or near hotels, restaurants, retail shops and other entertainment attractions. Some casinos are operated by governments, while others are privately owned. Some casinos offer a variety of gambling activities, including blackjack, craps, slot machines, and video poker. The most famous casino is the Monte Carlo Casino, located in the principality of Monaco.

Casinos are designed to maximize the amount of money that patrons win. They often offer inducements to big bettors, such as free spectacular entertainment, luxurious living quarters, and reduced-fare transportation and hotel accommodations. They also ensure that all bets are made within an established limit, so that a patron cannot win more than the casino can afford to pay.

The most common casino games are slot machines, poker, and roulette. Many US online casinos and mobile apps feature these games, which allow players to gamble cash or casino chips on random results, or combinations of random results. Some casinos have live dealers to supervise their games.

Because of the large amounts of money involved, casinos are subject to a number of security risks. To prevent cheating and theft, the most modern casinos employ a combination of physical security personnel and specialized surveillance technology. For example, they often have catwalks in the ceiling above casino tables that allow surveillance personnel to look down on game play through one-way glass.