A casino, also known as a gaming hall or gaming house, is a gambling establishment where patrons may play various games of chance. These games usually involve a substantial amount of money and are overseen by a casino staff. Many casinos are designed to be visually appealing and have a wide variety of entertainment options available.

In the United States, casinos are most common in cities that promote themselves as tourist destinations, such as Las Vegas and Atlantic City. Some casinos are owned by Native American tribes and operate on tribal land. Others are operated by commercial companies, such as MGM Resorts International. There are also a number of legal online casinos in the United States.

Casinos are also known for their high security standards. The security of a casino is typically divided between a physical security force and a specialized surveillance department. The surveillance department monitors the casino’s operations through closed circuit television and other security measures. In addition, patrons are often required to keep the cards they are holding visible at all times. This is to prevent cheating and stealing, which are sometimes perpetrated by employees or other patrons in collusion with one another or independently.

In the United States, there are more than 1,000 casinos. Most are concentrated in cities that attract tourists, such as Las Vegas, and some are owned by Native American tribes. The most famous casino in the world is probably the Monte Carlo Casino in Monaco, which was a gathering point for spies, dispossessed royals and other wealthy people during the Second World War and served as inspiration for Ian Fleming’s fictional James Bond 007 novel Casino Royale.