Books have been set forth on this issue, and the conflict and face-offs about where the "hot" video slots are installed in the casino are still happening – more than sixty yrs after slot machine games were first added to the gaming floor in gambling dens.
The quintessential rule is that the very best one armed bandits were positioned just inside the door of the casino; so that casino fanatics walking by would be able to see jackpot winners and be aroused to come inside and play. Our deduction is that this is definitely no longer so.
Just about all of the big name casinos nowadays are oversized complexes and it is not possible to see inside from the sidewalk, so there’s no longer a reason to position the ‘loose’ slots close to any doors.
Yet another classic rule is that loose slot machines are put on the major aisles inside the casinos, again so that more people could see winning jackpots and be energized to play. Notably 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 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 philosophy about where to place the loose slot machines.