A casino is a gambling establishment where people can place bets on various games of chance and win prizes based on the outcome of those bets. The games of chance are primarily slot machines, card games and table games. The casino industry is a major source of revenue in many countries around the world, and is regulated in most jurisdictions. Casinos often contain entertainment venues such as bars and restaurants, and some are famous for their landmark architecture.

In the United States, casinos are found in many cities and towns. Many states amended their laws in the 1980s and 1990s to allow for casinos, including on American Indian reservations. The largest casinos are in Atlantic City and Las Vegas, Nevada. Other popular gaming centers include Monte Carlo, Paris, and Singapore.

Guests of casinos may be tempted to cheat or steal, either in collusion with others or independently. To mitigate this risk, most casinos employ security measures such as cameras and other surveillance equipment. Some casinos also have catwalks in the ceiling that enable security personnel to look directly down, through one-way glass, on activities at the tables and slots.

Some casinos are famous for their entertainment offerings, drawing celebrities to their stages and enticing patrons to their tables with promises of glamour and excitement. Caesars Palace, for example, has hosted the likes of Frank Sinatra, Elton John, Celine Dion, Cher, Mariah Carey and Rod Stewart. Aside from a variety of game tables and slot machines, casinos often feature sports betting areas where people can place bets on American football, boxing, martial arts and soccer matches.