Books have been set forth on this subject, and the conflict and discussion about where the "hot" slot games are located in a casino are still raging – more than sixty yrs after one armed bandits were 1st placed in gambling dens.
The quintessential rule is that the superior slot machines were located just inside the main foyer of the casino; so that casino fanatics passing by would be able to see jackpot winners … be captivated to come unto the gaming floor and play. Our philosophy is that this is no longer true.
Practically all of the big name casinos today are titanic complexes and it is not possible to see inside from the sidewalk, so there’s no longer a reason to have the ‘loose’ slot games in close proximity to any entrances.
An additional standard rule is that loose slot machine games are placed on the major aisles in the casinos, again so that more folks could see winning jackpots and be energized to play. Importantly however, 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 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 philosophy about where to place the loose slot machine games.