Volumes have been stated on this subject, and the contention and discord about where the "hot" slot games are installed in a casino are still taking place – over sixty years after slot games were first installed in the casinos.
The quintessential rule is that the superior one armed bandits were installed just inside the main foyer of the casino; so that fun seekers passing by would see actual jackpot winners … be impressed enough to come unto the gaming floor … play. Our point of view is that this is definitely no longer the case.
The majority of the big name casinos today are magnificent complexes and you no longer can see inside from the sidewalk, so there’s no longer a reason to have the ‘loose’ slot machine games near any doorways.
An additional traditional rule is that loose slot machine games are located on the major aisles in the casinos, again so that more potential players could see winning jackpots and be energized to play. Notably however, 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 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!
Nowadays, casinos are constantly changing their philosophy about where to place the loose slot machine games.