Casinos are venues where gambling is a main activity. They are located in many cities, including Atlantic City, New Jersey, and Las Vegas, Nevada. They offer a wide variety of games for players to choose from. These include slot machines, roulette, and blackjack. The games are monitored by surveillance cameras.

The games are supervised by casino employees. These individuals monitor the players’ actions and the behavior of other patrons. They may also give gamblers free cigarettes or other complimentary items.

The casinos’ staff can be tempted to cheat the players, so most have security measures in place. Some have cameras in the ceiling that can be adjusted to watch suspicious patrons. Some have catwalks above the playing floor so that surveillance personnel can look down on the casino.

Some casinos have video feeds of the entire casino. These feeds are recorded, so that they can be reviewed after the fact.

The casinos have cameras on the floor, in the ceiling, and on each table. These are used to ensure that the casino doesn’t lose money on the games. They are also used to watch for cheating patterns.

A positive house edge is usually found in every game. This means that the casino will make more money than the player. This advantage is called the “house edge.”

The house edge is calculated by mathematicians and computer programmers. Gaming analysts do this work. This is important because it ensures that the casino will keep its advantage over the players for the long run.