Books have been stated on this item, and the debates and arguments about where the "hot" one armed bandits are located in the casino are still taking place – 60 years after slot machines were 1st installed in gambling dens.
The quintessential rule is that the superior slot machines were placed just inside the main foyer of the casino; so that fun seekers passing by would see real jackpot winners and be baited to come unto the gambling floor and play. Our view is that this is definitely no longer the case.
Most of the major casinos today are behemothic complexes … you can no longer see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ slot machines close to any entrances.
Yet another classic rule is that loose slot games are installed on the major aisles inside the casinos, again so that more potential gamblers could see winning jackpots and be energized to play. Importantly though, 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 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 one armed bandits.