Books have been said on this issue, and the disquiet and ruckus about where the "hot" slot machine games are located in a casino are still rampant – more than 60 yrs after slot games were 1st placed in gambling dens.
The standard rule is that the very best slot machine games were located just inside the main doorway of the casino; so that people walking by would see real jackpot winners … be stimulated to come inside … play. Our attitude is that this is no longer the case.
Almost all of the big name casinos presently are giant complexes and now you can’t see inside from the sidewalk, so there is no longer a reason to have the ‘loose’ slots in close proximity to any of the doors.
An additional classic rule is that loose slot machine games are located on the major aisles in the casinos, again so that more potential players could see winning jackpots and be inspired to play. Interestingly 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 very 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 slot machine games.