Books have been stated on this subject, and the debates and ruckus about where the "hot" video slots are positioned in the casino are still happening – over 60 yrs after slot machines were first installed in gambling houses.
The classic rule is that the best slot games were installed just inside the main foyer of the casino; so that folks going by would see actual jackpot winners … be impressed enough to come unto the gaming floor and play. Our position is that this is definitely no longer true.
The majority of the large casinos these days are enormous complexes … it’s no longer possible to see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slots close-by any of the doors.
Yet another traditional rule is that loose slot games are placed on the major aisles in the casinos, again so that more fun seekers could see winning jackpots and be encouraged 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 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 machines.