Books have been set forth on this item, and the debates and discourse about where the "hot" slot games are installed in the casino are still passionate – over sixty yrs after slot machines were first added to the gaming floor in gambling houses.
The quintessential rule is that the better slot games were installed just inside the door of the casino; so that potential players going by would see jackpot winners and be infatuated enough to come inside and play. Our frame of mind is that this is definitely no longer true.
Just about all of the mega casinos nowadays are oversized complexes and you can no longer see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slots close to any doorways.
An additional traditional rule is that loose one armed bandits are put on the major aisles inside the casinos, again so that more people could see winning jackpots and be roused 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 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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slots.