A casino is a place where people play gambling games, usually for money. The term is used to describe both land-based and online casinos.

Gambling is a major revenue source for many cities, especially those with large numbers of tourists. In the United States, the majority of casino gambling takes place in Las Vegas and Atlantic City.

Most casinos offer a variety of games, including blackjack, roulette, poker, and slot machines. Some Asian casinos also offer traditional Far Eastern games like sic bo, fan-tan, and pai-gow.

These games give casinos a certain degree of mathematical assurance that their patrons will win. This allows casinos to charge high odds for games such as blackjack and roulette, and lower them for games like craps.

There are a number of security measures in casinos to protect against cheating and theft, including cameras and staff members who keep an eye on everything. Some of these are based in the gaming rooms while others are focused on the entire casino.

In addition to these basic security measures, some casinos have higher-up employees who monitor each table game, keeping an eye on how much money is being bet and ensuring that patrons do not steal from each other.

Some casinos also offer free drinks, cigarettes, entertainment, and luxury living quarters for those who bet a lot of money. This has a positive impact on the local economy by increasing tourist activity, but it can also have a negative impact on the community as a whole because of the high incidence of gambling addiction.