Books have been set forth on this matter, and the contention and squabbling about where the "hot" slot machine games are placed in the casino are still raging – over sixty yrs after the slots were first installed in gambling houses.
The quintessential rule is that the superior one armed bandits were put just inside the main door of the casino; so that fun seekers going by would see actual jackpot winners and be keen enough to come unto the gaming floor and play. Our verdict is that this is no longer true.
Nearly all of the large casinos today are super-colossal complexes … it is not possible to see inside from the sidewalk, so there is no longer a reason to have the ‘loose’ slot machine games near to any doorways.
An additional standard rule is that loose one armed bandits are positioned on the major aisles inside the casinos, again so that more potential players could see winning jackpots and be encouraged to play. 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!
These days, casinos are constantly changing their perspective about where to place the loose slot machine games.