Books have been said on this subject, and the debates and disagreement about where the "hot" slots are located in the casino are still taking place – 60 years after slots were first added to the gaming floor in the casinos.
The standard rule is that the superior slot games were put just inside the main foyer of the casino; so that persons passing by would see actual jackpot winners and be impressed enough to come inside and play. Our opinion is that this is no longer true.
Nearly all of the big name casinos presently are mammoth complexes and you can no longer see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ slot games close to any doorways.
Another traditional rule is that loose one armed bandits are positioned on the major aisles inside the casinos, again so that more fun seekers could see winning jackpots and be energized 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 one armed bandits 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!
These days, casinos are constantly changing their philosophy about where to place the loose slot machine games.