Casino, also known as gambling houses or gaming rooms, are commercial establishments where people gamble. They include games of chance, such as slots and video poker, and skill-based games such as blackjack and roulette. Casinos also offer food and beverages and often show spectacular entertainment. Some casinos are built as large resorts; others are small card rooms. Casinos bring in billions of dollars each year for the owners, shareholders, investors and Native American tribes that run them. They also generate taxes and fees for state and local governments.
Most games have a mathematical advantage for the house, which is called the house edge. This advantage can be lower than two percent, but it adds up over the millions of bets placed each year. The money generated by this edge is a primary source of profits for the casino. In addition to the edge, the casino charges a commission on some games, such as poker and video poker, called the rake. Casinos also give out complimentary items, or comps, to gamblers.
Casinos use many psychological tricks to lure in and keep patrons spending money. They are decorated with bright colors and often feature gaudy art that has a cheering effect. They also have no clocks on the walls to prevent players from keeping track of time. They employ a variety of sound systems to make the casino atmosphere as exciting and fun as possible. Some casinos are even designed to be reminiscent of ancient Egyptian or Roman temples.