Volumes have been written on this subject, and the conflict and ruckus about where the "hot" slots are located in the casino are still raging – over sixty years after slot machine games were first placed in the casinos.
The standard rule is that the most favorable slot machine games were placed just inside the main entry of the casino; so that people passing by would see jackpot winners and be stimulated to come unto the gaming floor and play. Our belief is that this is no longer the case.
Nearly all of the mega casinos these days are titanic complexes … it’s no longer possible to see inside from the sidewalk, so there’s no longer a reason to position the ‘loose’ slots close-by any entrances.
Yet another classic rule is that loose slots are installed on the major aisles inside the casinos, again so that more fun seekers could see winning jackpots and be inspired to play. Notably however, 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 slot games 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 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!
Nowadays, casinos are constantly changing their perspective about where to place the loose one armed bandits.