Books have been stated on this matter, and the conflict and feuds about where the "hot" one armed bandits are installed in the casino are still there – sixty years after slot games were first installed in gambling houses.
The traditional rule is that the better slot games were located just inside the entrance of the casino; so that everyone going by would see jackpot winners … be enthralled to come into the casino … play. Our theory is that this is definitely no longer so.
Many of the major casinos these days are gigantic complexes … it is not possible to see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slot games close to any doorways.
Yet another standard rule is that loose one armed bandits are positioned on the major aisles inside the casinos, again so that more folks could see winning jackpots and be influenced to play. Interestingly 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 the slot machines 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!
These days, casinos are constantly changing their perspective about where to place the loose one armed bandits.