Books have been said on this matter, and the contention and disharmony about where the "hot" slot machine games are located in the casino are still rampant – more than sixty years after slot games were first placed in the casinos.
The traditional rule is that the better slot machine games were located just inside the main doorway of the casino; so that casino fanatics going by would see actual jackpot winners … be mesmerized enough to come inside … play. Our speculation is that this is not so anymore.
Practically all of the big name casinos presently are enormous complexes and you no longer can see inside from the sidewalk, so there’s no longer a reason to position the ‘loose’ slot machines in close proximity to any doors.
Yet another standard rule is that loose slots are put on the major aisles inside the casinos, again so that more folks could see winning jackpots and be energized to play. Nonetheless, 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 slot machines 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!
In recent times, casinos are constantly changing their perspective about where to place the loose slot games.