A casino is a facility for certain types of gambling. It may be a standalone structure, or it may be part of a larger resort or hotel. Casinos are also often associated with entertainment, such as stage shows and other live performances. They are also known for offering a variety of luxury amenities to attract and retain gamblers, such as free drinks and gourmet restaurants.

Most casinos feature games of chance, including slot machines and table games such as blackjack and roulette. Some, like craps, have an element of skill, but most games are purely luck-based. The games are usually played with chips, and winnings are determined by a combination of factors, including the house edge (the mathematically determined advantage that the casino has over players), pay tables, and other factors. Casinos rely on these profits to attract gamblers and generate the billions in annual revenues they bring in.

Modern casinos are designed to stimulate the senses of the gambling patron, with loud music and bright lights creating a partylike atmosphere. Many have fountains or other artificial scenery, and they often feature a large prize, such as a sports car or trip to Las Vegas. Casinos also promote themselves through comp programs, which reward frequent visitors with discounted or free food and services. They also collect patron data to help target advertising and mail marketing. Casino security is another major focus, with dealers trained to spot blatant cheating such as palming or marking cards. Even subtler behaviors are monitored, with employees keeping an eye out for changes in betting patterns that could signal a change in player sentiment.