A casino is a building or room where various games of chance are played. The term is also used for places that offer a variety of other forms of gambling, such as lotteries and racetracks. Some casinos are standalone while others are built within hotels, resorts or other entertainment venues. Some casinos are operated by governments, while others are owned and operated by private enterprises. The number of casinos has increased significantly since the 1960s, as more states have legalized gambling.
A few of the earliest casinos were established in the 19th century, with Monte Carlo first opening its doors to the public in 1863. The modern casino is an international tourist attraction and generates significant revenue for the principality of Monaco. In the United States, Las Vegas is the largest casino market, followed by Atlantic City and then Chicago. Casinos are also popular in some European countries, particularly in Spain and Italy.
Most casinos provide a wide range of gambling activities, from traditional table games such as blackjack and roulette to more modern video poker machines. Many of these have advanced security features to prevent cheating and theft, especially given the large amounts of money that change hands. For example, some casinos have catwalks above the casino floor that allow surveillance personnel to look down through one-way glass at patrons playing certain tables and machines. Other security measures include video cameras throughout the facility and sophisticated computer systems that can monitor patron activity at a given moment.