Volumes have been written on this issue, and the debates and ruckus about where the "hot" slot machine games are located in a casino are still there – 60 yrs after slots were 1st installed in casinos.
The classic rule is that the most favorable slot machine games were put just inside the main door of the casino; so that fun seekers going by would see actual jackpot winners and be possessed to come unto the gaming floor and play. Our slant is that this is definitely no longer so.
Most of the large casinos presently are humongous complexes … you can no longer see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slot machine games near any doors.
Another classic rule is that loose slot machine games are installed on the major aisles in the casinos, again so that more folks could see winning jackpots and be influenced to play. Notably though, 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 machine 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!
These days, casinos are constantly changing their perspective about where to place the loose slots.