Books have been stated on this issue, and the controversy and discourse about where the "hot" one armed bandits are located in a casino are still intense – more than sixty years after the slot machines were 1st installed in gambling dens.
The traditional rule is that the better one armed bandits were located just inside the door of the casino; so that persons going by would be able to see jackpot winners … be aroused to come unto the gaming floor and play. Our presumption is that this is definitely no longer true.
Just about all of the major casinos presently are mammoth complexes and it is not possible to see inside from the sidewalk, so there’s no longer a reason to have the ‘loose’ slots close to any exits.
An additional classic rule is that loose one armed bandits are installed on the major aisles in the casinos, again so that more persons could see winning jackpots and be influenced to play. However, 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 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 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 machine games.