A casino is a place where people can gamble on games of chance. It also offers entertainment and restaurants. The most famous casino is in Las Vegas, but there are many other casinos worldwide. Some are quite elaborate, with towers and fountains, and can cost millions to build. Others are more modest in size, but still have a gambling floor. Some casinos are located in other types of buildings, including hotels and cruise ships.

In recent years there has been a growth in the number of casinos in the United States, with the majority located in Las Vegas and Atlantic City. There are also some in Chicago, Oklahoma City and Denver. The casinos have become popular with both locals and tourists, who visit them for the excitement and glamour of the facilities.

There are also a number of security measures in place to prevent cheating by players and theft by staff members. These measures range from spotting blatant palming of cards to checking for betting patterns that might indicate collusion between players. The casinos also employ a number of technological devices to monitor the games and prevent fraud.

In order to keep their patrons happy, some casinos offer free goods and services to high rollers (gamblers who bet large sums of money). These are called comps and can include things like hotel rooms, food, drink, tickets to shows or limo service. They are usually based on the amount of time and money spent at the casino, as well as the stakes of the game being played.