Volumes have been written on this issue, and the conflict and disharmony about where the "hot" slot machines are positioned in a casino are still on-going – over 60 yrs after one armed bandits were 1st placed in gambling houses.
The classic rule is that the best slots were located just inside the door of the casino; so that persons walking by would see jackpot winners … be challenged to come unto the gaming floor … play. Our verdict is that this is definitely no longer the case.
Practically all of the major casinos these days are jumbo complexes … it is not possible to see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slot machine games near to any exits.
An additional classic rule is that loose slot machine games are placed on the major aisles in the casinos, again so that more potential players could see winning jackpots and be roused to play. Notably though, we find that this also is not 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 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.