Volumes have been set forth on this matter, and the bickering and disagreement about where the "hot" one armed bandits are positioned in the casino are still ongoing – more than sixty years after slot games were 1st placed in casinos.
The quintessential rule is that the most favorable slot machines were put just inside the door of the casino; so that casino fanatics going by would see real jackpot winners … be mesmerized enough to come unto the gambling floor … play. Our presumption is that this is definitely no longer so.
Many of the big name casinos today are behemothic complexes … it’s no longer possible to see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slot machine games near any entrances.
Yet another classic rule is that loose slot machine games are positioned on the major aisles in the casinos, again so that more people could see winning jackpots and be influenced to play. Importantly however, we find that this also is no longer a universal rule.
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 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!
These days, casinos are constantly changing their perspective about where to place the loose slot games.