Books have been stated on this issue, and the disquiet and feuds about where the "hot" slot games are located in the casino are still rampant – more than 60 yrs after slot machines were first placed in casinos.
The classic rule is that the better slot machines were installed just inside the door of the casino; so that casino fanatics walking by would see jackpot winners and be titillated to come inside … play. Our inference is that this is not so anymore.
Many of the big name casinos nowadays are monstrous complexes and now you can’t see inside from the sidewalk, so there’s no longer a reason to have the ‘loose’ one armed bandits near any doors.
An additional standard rule is that loose slots are put on the major aisles inside the casinos, again so that more folks could see winning jackpots and be encouraged to play. Nonetheless, 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 the 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!
In recent times, casinos are constantly changing their perspective about where to place the loose slot machine games.