A casino is a gambling establishment that offers a variety of games of chance and, in some cases, skill. In games of chance, such as craps and roulette, the house has at all times a mathematical advantage over the players; this is known as the house edge. In games of skill, such as blackjack and video poker, the house earns money via a commission called the rake. Casinos also give out complimentary items to gamblers, known as comps.

Although casinos offer a wide variety of gambling opportunities, they are not without their critics. Some argue that casino profits merely shift spending away from other forms of entertainment and that the costs of treating problem gamblers negate any economic benefits they might bring to a community. In addition, studies have shown that casino gambling does not lead to higher education levels and can even lower incomes by increasing the number of people who are unemployed or addicted to gambling.

Despite these concerns, many people enjoy visiting casinos for the glitz and glamour. The buildings are often lavish and decorated with unique ornamentation. They are designed to stimulate the senses and draw attention from the crowds of players. Bright colors like red are used to attract the eyes, and more than 15,000 miles of neon tubing is utilized in the Las Vegas Strip casinos. Casinos are a major source of revenue for many countries and, in some cases, represent the largest sources of employment for local residents.