A casino is a building or room where gambling games are played. Modern casinos are often integrated with hotels, restaurants, retail shops and other entertainment venues. They may also offer convention facilities and meeting space. In some countries, casinos are licensed and regulated by government agencies.

The largest concentration of casinos in the United States is in Las Vegas, followed by Atlantic City and then Chicago. There are also a number of smaller casinos in other states and countries, including Japan.

Casinos have long offered perks to attract gamblers, from free drinks to hotel rooms and show tickets. These comps are designed to make sure that all of a casino’s patrons spend their money, which helps ensure that the house always has a positive mathematical expectancy. The more a casino can expect to win, the higher its gross profit.

In addition to offering free things to people who come to gamble, casinos often have security measures in place to deter cheating and theft by patrons or staff members. For example, pit bosses and table managers monitor the activities at their tables, keeping an eye out for suspicious betting patterns. Security cameras are often mounted in the ceilings of casinos to provide a “eye in the sky” view of all activity.

A famous casino is the Bellagio in Las Vegas, which is known for its dancing fountains and luxury accommodations. This casino is often featured in movies and television shows.