A casino is a building that allows people to gamble and play games of chance. It is often associated with glamour, luxury and excitement, but it can also be a source of controversy and even addiction. Casinos can be found all over the world and are a huge draw for tourists and locals alike.

Most casinos employ a high level of security to prevent cheating and theft. Security personnel keep their eyes on the patrons and games, looking for blatant signs of cheating, such as palming, marking or switching cards or dice. Table managers and pit bosses watch the tables with a more general view, looking for betting patterns that might signal cheating. Throughout the casino, cameras in the ceiling act as a high-tech eye-in-the-sky that can be adjusted to focus on suspicious patrons by security workers in a room filled with banks of monitors.

Many casinos offer complimentary items, or comps, to their customers. These can include free hotel rooms, meals or tickets to shows. The amount of time and money a customer spends at the casino is usually used to determine how much he or she will be comped.

Casinos are often criticised for the effect they have on local economies, with research showing that they reduce spending on other forms of entertainment and lead to a drop in property values. Additionally, problem gambling can cause damage to family relationships and finances. For this reason, most state laws include responsible gambling measures.