Books have been said on this item, and the contention and disharmony about where the "hot" video slots are located in a casino are still ongoing – over 60 yrs after the slot machines were 1st placed in the casinos.
The classic rule is that the very best slot machine games were put just inside the entrance of the casino; so that persons going by would see real jackpot winners … be aroused to come unto the gaming floor and play. Our conclusion is that this is definitely no longer true.
The great majority of the large casinos nowadays are humongous complexes and you can no longer see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ slots near any of the doors.
Yet another standard rule is that loose slot machine games are installed on the major aisles in the casinos, again so that more persons could see winning jackpots and be energized to play. Interestingly though, 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 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!
Nowadays, casinos are constantly changing their philosophy about where to place the loose slot machines.