A casino is a facility which houses and accommodates certain types of gambling activities. While there is much debate over the social and economic impact of casino gambling, most jurisdictions permit casinos to operate. Casinos are usually located in commercial or tourist areas, and may offer a variety of entertainment options beyond gambling. They also serve as a source of employment for many people.

Although casino gambling is an activity that involves pure chance, some players are tempted to cheat or steal. This is a significant threat to the financial integrity of casinos, and it is one reason why they spend so much money on security. Many casinos hire full-time staff specifically for security, and employ a variety of surveillance methods to monitor patrons and employees.

Casinos also make money by charging players a small percentage of their bets, known as the house edge. This advantage can be as low as two percent, but it adds up over time and makes the casino profitable. The house edge is an important factor to consider when choosing which games to play.

Casinos may also offer comps to players, which are free goods or services based on the amount of money the player bets. These can include hotel rooms, meals, show tickets, or even limo service and airline tickets for big spenders. Most casinos have special rooms where players can receive comps, and they will often display them prominently. Online casinos are also starting to use these techniques.