A casino is an entertainment facility where people play games of chance. Casinos offer various types of gambling, from table games like poker and roulette to slot machines.

Aside from gambling, casinos provide their customers with free cigarette packages, discounted transportation, and other perks. There are also casino resorts, which include hotel rooms, restaurants, and entertainment.

Casinos often employ security measures, such as cameras, to keep track of their patrons. In addition, employees watch for suspicious behavior and the ominous signs of cheating.

The game of craps is a popular one, as is roulette. But other dice games are important as well.

Some casinos also offer more sophisticated gaming options, such as video poker. These are largely automated. When a player presses the button, the machine will determine whether the wager wins or loses.

Casinos also employ computer and video surveillance to keep tabs on their players. This includes monitoring bets on minute-to-minute basis.

In general, a casino’s advantage or “house edge” is a percentage of the expected value of the game. It tells the casino how much profit they can expect to make from the game, and how much they need to set aside for potential losses.

Another measure is the “hold percentage,” which is essentially the win percentage. This is the difference between the actual odds and the theoretical odds. For example, if the true odds of winning a roulette spin are 37 and the theoretical odds are 38, the hold percentage is 34.