Books have been set forth on this matter, and the debates and discussion about where the "hot" slot games are installed in a casino are still raging – 60 years after slots were first added to the gaming floor in the casinos.
The traditional rule is that the better slot games were positioned just inside the main entryway of the casino; so that potential gamblers going by would see real jackpot winners … be titillated to come unto the gaming floor and play. Our belief is that this is definitely no longer true.
Most of the major casinos today are immense complexes … you no longer can see inside from the sidewalk, so there is no longer a reason to have the ‘loose’ one armed bandits near to any exits.
Yet another standard rule is that loose slot games are put on the major aisles inside the casinos, again so that more potential gamblers could see winning jackpots and be motivated 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 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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slot games.