Books have been set forth on this subject, and the controversy and discourse about where the "hot" video slots are located in a casino are still rampant – over sixty years after slots were first placed in the casinos.
The standard rule is that the very best one armed bandits were put just inside the main entry of the casino; so that people passing by would be able to see jackpot winners … be impressed enough to come unto the gambling floor and play. Our theorem is that this is not so anymore.
Nearly all of the large casinos today are oversized complexes … now you can’t see inside from the sidewalk, so there is no longer a reason to place the ‘loose’ slot machines near any of the doors.
An additional standard rule is that loose one armed bandits are located on the major aisles in the casinos, again so that more potential players could see winning jackpots and be energized 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 slot machine games 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 machines.