Books have been set forth on this issue, and the controversy and face-offs about where the "hot" slot games are placed in the casino are still passionate – sixty yrs after the slot machines were first installed in the casinos.
The traditional rule is that the very best slots were put just inside the main entry of the casino; so that casino fanatics passing by would see real jackpot winners … be inspired to come inside and play. Our assessment is that this is definitely no longer the case.
Practically all of the major casinos presently are titanic complexes and you no longer can see inside from the sidewalk, so there’s no longer a reason to place the ‘loose’ slot games in close proximity to any exits.
Yet another traditional rule is that loose slot machine games are placed on the major aisles in the casinos, again so that more persons could see winning jackpots and be motivated to play. Notably however, we find that this also isn’t 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 the 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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slot machine games.