Volumes have been set forth on this matter, and the conflict and squabbling about where the "hot" slots are installed in the casino are still ongoing – more than 60 yrs after slot games were 1st placed in gambling houses.
The classic rule is that the more favourable slots were placed just inside the entrance of the casino; so that folks passing by would see actual jackpot winners … be captivated to come unto the gaming floor and play. Our estimation is that this is definitely no longer the case.
Nearly all of the large casinos these days are behemothic complexes … you can no longer see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slot machines close to any of the doors.
Yet another traditional rule is that loose slot machine games are put on the major aisles inside the casinos, again so that more folks could see winning jackpots and be motivated to play. 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 one armed bandits 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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slots.