Volumes have been set forth on this subject, and the debates and disharmony about where the "hot" one armed bandits are located in a casino are still bubbling – more than 60 yrs after slots were first added to the gaming floor in gambling dens.
The quintessential rule is that the superior slots were positioned just inside the main entryway of the casino; so that individuals passing by would be able to see actual jackpot winners and be challenged to come inside … play. Our reasoning is that this is not so anymore.
The majority of the mega casinos presently are humongous complexes and you can no longer see inside from the sidewalk, so there is no longer a reason to position the ‘loose’ slot machine games close-by any doors.
Yet another standard rule is that loose slots are placed on the major aisles in the casinos, again so that more persons could see winning jackpots and be inspired to play. Notably however, 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 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!
Today, casinos are constantly changing their perspective about where to place the loose slots.