A casino is a facility for certain types of gambling. Many casinos are combined with hotels, resorts, restaurants, retail shops or other tourist attractions. Some cities have laws specifically regulating gambling activity. The exact origin of gambling is uncertain, but it is widely believed that people have gambled for entertainment throughout recorded history. Gambling is often seen as socially acceptable when done responsibly, but some individuals are unable to control their addiction and end up losing large sums of money or their lives.
In the United States, about 51 million people over the age of 21 visited a casino in 2002, making casinos one of the largest sources of revenue in the country. They can be found from coast to coast and are almost always heavily promoted via television and other forms of advertising. The modern casino is more like an indoor amusement park than a traditional gaming establishment, with lighted fountains, musical shows, elaborate themes and gambling as the main attraction.
While a wide variety of games are available at most casinos, the majority of them are games of chance or with an element of skill such as blackjack, roulette, craps, baccarat and video poker. The mathematically determined odds in these games give the house a permanent advantage over players, which is called the house edge. Casinos also earn money from other sources such as dining, entertainment and room services, and some offer a variety of complimentary items to their patrons known as comps.