Books have been stated on this subject, and the bickering and face-offs about where the "hot" slot machine games are positioned in the casino are still bubbling – more than 60 yrs after the slots were first placed in gambling houses.
The quintessential rule is that the very best slots were located just inside the main doorway of the casino; so that individuals going by would see jackpot winners and be infatuated enough to come unto the gaming floor … play. Our conviction is that this is definitely no longer true.
Many of the big name casinos these days are immense complexes and now you can’t see inside from the sidewalk, so there is no longer a reason to place the ‘loose’ one armed bandits in close proximity to any of the doors.
An additional classic rule is that loose slots are put on the major aisles in the casinos, again so that more persons could see winning jackpots and be motivated 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 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 slots.