Volumes have been written on this topic, and the bickering and disagreement about where the "hot" slot games are installed in a casino are still passionate – over 60 yrs after slots were 1st placed in the casinos.
The traditional rule is that the very best slot games were positioned just inside the main door of the casino; so that potential players passing by would be able to see real jackpot winners and be smitten to come unto the gaming floor and play. Our resolve is that this is definitely no longer the case.
Practically all of the big name casinos these days are monstrous complexes and you no longer can see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ one armed bandits near to any exits.
An additional classic rule is that loose one armed bandits are installed on the major aisles in the casinos, again so that more folks could see winning jackpots and be encouraged to play. Nonetheless, 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 the slot machines 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!
In recent times, casinos are constantly changing their perspective about where to place the loose slot games.