Books have been stated on this topic, and the disquiet and disharmony about where the "hot" slots are installed in a casino are still bubbling – sixty years after slot machines were first placed in gambling houses.
The quintessential rule is that the best slot machines were put just inside the door of the casino; so that potential gamblers passing by would see jackpot winners … be enthralled to come unto the gaming floor and play. Our stance is that this is definitely no longer true.
Many of the large casinos these days are super-colossal complexes … now you can’t see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slots near any entrances.
An additional classic rule is that loose one armed bandits are located on the major aisles inside the casinos, again so that more folks could see winning jackpots and be galvanized 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 the 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 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!
Today, casinos are constantly changing their philosophy about where to place the loose slot games.