Volumes have been stated on this issue, and the contention and face-offs about where the "hot" slot games are positioned in a casino are still ongoing – over sixty yrs after slot machine games were 1st placed in gambling houses.
The traditional rule is that the better slot games were installed just inside the main door of the casino; so that casino fanatics going by would see actual jackpot winners … be stirred to come into the casino … play. Our perspective is that this is definitely no longer the case.
Just about all of the major casinos presently are immense complexes … it is not possible to see inside from the sidewalk, so there is no longer a reason to situate the ‘loose’ one armed bandits close to any doorways.
An additional standard rule is that loose one armed bandits are placed on the major aisles inside the casinos, again so that more persons could see winning jackpots and be roused to play. Notably though, 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 one armed bandits 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 slot machines.