Books have been set forth on this matter, and the disquiet and arguments about where the "hot" slot machine games are positioned in a casino are still raging – more than sixty years after slot machines were first installed in casinos.
The quintessential rule is that the better one armed bandits were put just inside the door of the casino; so that casino fanatics going by would see jackpot winners … be impressed enough to come inside and play. Our inclination is that this is definitely no longer true.
Many of the big name casinos today are jumbo complexes … you no longer can see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ slots close to any doors.
Another traditional rule is that loose slot machine games are installed on the major aisles inside the casinos, again so that more folks could see winning jackpots and be roused to play. Notably however, we find that this also isn’t 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 slot machine 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 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 slots.