Books have been set forth on this subject, and the conflict and interchanges about where the "hot" slot games are positioned in a casino are still there – 60 yrs after the slots were 1st added to the gaming floor in gambling dens.
The classic rule is that the best slots were installed just inside the door of the casino; so that fun seekers going by would be able to see real jackpot winners and be stirred to come into the casino … play. Our inference is that this is not so anymore.
Practically all of the major casinos today are huge complexes and it is not possible to see inside from the sidewalk, so there is no longer a reason to place the ‘loose’ slot machines near to any doors.
An additional classic rule is that loose one armed bandits are positioned on the major aisles inside the casinos, again so that more folks could see winning jackpots and be roused 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!
These days, casinos are constantly changing their perspective about where to place the loose slots.