A casino is a place where people gamble by playing games of chance and skill. Although most games are fair, the casino has an edge over the players. This advantage is called the house edge or the rake. The casino also gives players complimentary items or comps. In return for their money, they get paid a percentage of the winnings.

Casinos are usually built near tourist attractions and are used for live entertainment. The word casino has its origin in Italy, where it once denoted a summer house, villa, or social club. Over the centuries, the casino has evolved into a modern-day entertainment complex that combines gambling with other forms of recreation.

There are now over 1,000 casinos across the United States. The number continues to grow as more states legalize casinos. As of 2016, over 40 states have legalized casino gambling, and more are expected. Most states are legalizing casinos in response to increased competition from other states. Casinos are not limited to larger cities, although the Las Vegas Valley has the highest concentration. Atlantic City, New Jersey and the Chicago area are also home to many casinos.

Modern casinos have strict security measures. These include cameras and a code of conduct. Players are also required to keep their cards visible at all times while playing games. These are measures to protect the assets of the casino and keep guests safe.