Security at a casino starts with the rules of conduct. Everyone must display their cards when playing certain games, such as blackjack. Casinos also have elaborate surveillance systems to monitor their customers. Cameras are mounted on the ceiling to monitor every doorway, table, and window. Cameras can be adjusted to focus on suspicious patrons. Video feeds are recorded for later review. Security personnel do not watch the slot floors, as they are too busy dealing cards.
Gambling is illegal in some American states, but there are exceptions, such as on reservations and in Puerto Rico. Most countries in Europe allow casinos, but they are not widely available. In the United Kingdom, licensed gambling clubs have operated since 1960. Casinos are also legal in France, where many famous European casinos are located. Some states even allow American Indian casinos. While most casinos have strict antigambling laws, some states have amended their gambling laws to allow casinos.
Besides table games, there are also video poker machines and slots. Video poker machines have become the economic lifeblood of American casinos. While the advantage to the house is usually less than 1 percent, some casinos are inclined to demand a higher percentage. Other games are more appealing to big bettors, such as craps. Casinos usually spend large amounts on security and other measures. They invest millions of dollars in the technology that keeps the casino safe from robbers.