A casino is an establishment for certain types of gambling. It is often built near or combined with hotels, resorts, restaurants, retail shops, and other tourist attractions. In the United States, casinos are regulated by state and local laws. Most casinos are operated by private corporations. Some are owned by Native American tribes. The word casino can also refer to an entire building or group of buildings used for such purposes. It may also refer to a place that has a large variety of entertainment options, such as concerts and stand-up comedy.

Casinos make money by taking a small percentage of all bets. This advantage can be less than two percent, but it adds up over the millions of dollars wagered by patrons each year. Casinos also earn money by giving out complimentary items to gamblers, known as comps. These can include free hotel rooms, meals, show tickets and even limo service or airline tickets for high rollers.

Due to the large amounts of money involved, security is a major concern for casinos. Casino staff keep a close eye on patrons, looking for any suspicious behavior. Security cameras are usually placed throughout the casino. There are also several guards on the casino floor to monitor game play. Casinos also hire outside companies to conduct audits of their gaming operations. These audits are aimed at making sure the casino is operating fairly and does not have any hidden expenses. Many casinos also have a charity foundation to support the local community.