Volumes have been set forth on this topic, and the controversy and ruckus about where the "hot" slot machine games are placed in a casino are still passionate – sixty yrs after one armed bandits were first placed in gambling dens.
The classic rule is that the more favourable slots were located just inside the entry of the casino; so that potential gamblers walking by would be able to see actual jackpot winners … be influenced to come unto the gambling floor … play. Our viewpoint is that this is not so anymore.
Most of the big name casinos these days are monstrous complexes … you no longer can see inside from the sidewalk, so there is no longer a reason to have the ‘loose’ one armed bandits in close proximity to any entrances or exits.
Another classic rule is that loose slots are placed on the major aisles inside the casinos, again so that more potential players could see winning jackpots and be roused to play. Interestingly though, 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 slot games 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!
Today, casinos are constantly changing their perspective about where to place the loose slot games.