Casino is an entertainment establishment that offers a wide variety of gambling products to customers. Most casinos feature games of chance or a mixture of skill and chance, such as blackjack, craps, roulette, baccarat, and video poker. The majority of casino profits come from slot machines and other electronic gaming devices. Casinos also offer food and drinks, shows, shopping centers, and hotel accommodations.

Casinos are often designed with windows, lighted fountains and elaborate themes to attract guests and promote them as upscale businesses. They may be built on a mountaintop, next to a river or in an old castle. The modern casino has become something of an indoor amusement park for adults. Its main source of income is from gamblers, with musical shows and dazzling lights and decorations to lure them in.

Gambling is illegal in most places, but casinos draw in huge crowds of people who want to try their luck at winning money or other prizes. Many casinos also have a dark side, with a large percentage of revenue from addicted gamblers. Economic studies have shown that the net value of a casino to a community is negative, as it shifts local spending from other forms of entertainment and raises costs for social services such as treating compulsive gambling problems.

The first casinos were run by organized crime figures, who had lots of cash from their drug dealing and extortion rackets. But as mob influence faded, legitimate businessmen with deep pockets took over and ran casinos on their own. They used their capital to finance casino expansion and renovation, and to hire top security personnel.