Books have been set forth on this item, and the bickering and discussion about where the "hot" one armed bandits are located in a casino are still intense – over 60 years after one armed bandits were first added to the gaming floor in gambling houses.
The standard rule is that the most favorable slot machines were put just inside the door of the casino; so that potential gamblers going by would be able to see real jackpot winners and be impressed enough to come unto the gaming floor … play. Our opinion is that this is no longer the case.
Most of the large casinos presently are herculean complexes and you no longer can see inside from the sidewalk, so there is no longer a reason to place the ‘loose’ slot machines close-by any doors.
Yet another standard rule is that loose slot machine games are placed on the major aisles inside the casinos, again so that more fun seekers could see winning jackpots and be encouraged to play. Importantly though, we find that this also is not a universal rule any more.
What casinos found over the years is that people walking down the busy aisles were frequently on the way to somewhere else. If they played slots at all, they would simply put in their loose change because they happened to be walking by. Win or lose, they would very often not stop to keep playing. And the very last thing a casino wants is for someone to win a jackpot by playing only a few coins and then not stay to put it all back in!
Today, casinos are constantly changing their perspective about where to place the loose slot machine games.