A Casino is a facility for gambling, with a variety of games offered to customers. The games are typically based on chance or in some cases skill, and the house has a long-term advantage over the players. This advantage is known as the house edge. Most casinos have security measures in place to deter cheating and other criminal activity, including CCTV cameras and other electronic surveillance. Some casinos are regulated by government agencies.

In the United States, casinos are most often found in Las Vegas, Atlantic City and Chicago. In the late 20th century, many states changed their laws to permit legal casinos on American Indian reservations and in other places, and some casinos are even found aboard riverboats. In the 21st century, Internet casinos have been increasingly popular.

Casinos are staffed by professional security personnel and offer a variety of services to their customers. They offer table games, slot machines and video poker as well as a wide selection of other gambling-related products such as cigarettes, cigars, drinks and food. Casinos also provide a range of entertainment options, such as concerts and comedy shows.

While the precise origins of gambling are unknown, it is widely believed to have been around for thousands of years. Throughout history, societies have sought ways to relieve boredom and anxiety. Some of these activities have been adapted into modern casino games, such as the lottery, bingo, keno and card games. Modern casinos are regulated by government authorities to ensure fairness and integrity.