Volumes have been said on this matter, and the conflict and arguments about where the "hot" slot games are installed in the casino are still there – 60 yrs after slots were 1st installed in casinos.
The standard rule is that the more favourable one armed bandits were positioned just inside the door of the casino; so that persons going by would be able to see jackpot winners … be intrigued enough to come inside and play. Our conviction is that this is no longer the case.
Many of the mega casinos presently are jumbo complexes … it’s no longer possible to see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slots close-by any doorways.
An additional classic rule is that loose slot games are installed on the major aisles inside the casinos, again so that more people could see winning jackpots and be motivated to play. Notably 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 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!
Today, casinos are constantly changing their philosophy about where to place the loose slot games.