Books have been set forth on this topic, and the controversy and feuds about where the "hot" slot games are installed in the casino are still ongoing – 60 years after slots were first placed in gambling houses.
The classic rule is that the superior slot machine games were positioned just inside the main entry of the casino; so that fun seekers walking by would be able to see actual jackpot winners … be challenged to come unto the gambling floor and play. Our thought is that this is no longer true.
Most of the major casinos nowadays are humongous complexes and now you can’t see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ slots in close proximity to any entrances or exits.
Yet another traditional rule is that loose slot machine games are located on the major aisles inside the casinos, again so that more people could see winning jackpots and be encouraged to play. Importantly though, we find that this also isn’t 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 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 philosophy about where to place the loose slot machine games.