Volumes have been stated on this matter, and the debates and arguments about where the "hot" video slots are installed in a casino are still rampant – 60 yrs after slot machine games were 1st placed in gambling houses.
The traditional rule is that the most favorable slot games were placed just inside the main foyer of the casino; so that folks walking by would be able to see real jackpot winners and be aroused to come into the casino and play. Our frame of mind is that this is definitely no longer the case.
Many of the major casinos nowadays are giant complexes … now you can’t see inside from the sidewalk, so there’s no longer a reason to have the ‘loose’ slot games near to any doors.
Another classic rule is that loose slot games are installed on the major aisles in the casinos, again so that more persons could see winning jackpots and be roused 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 slots 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 one armed bandits.