Books have been stated on this topic, and the controversy and squabbling about where the "hot" slot games are located in a casino are still passionate – over 60 yrs after slots were 1st added to the gaming floor in gambling dens.
The classic rule is that the more favourable slot machines were put just inside the main entryway of the casino; so that casino fanatics going by would see real jackpot winners … be infatuated enough to come into the casino and play. Our deduction is that this is definitely no longer so.
Nearly all of the major casinos presently are huge complexes … now you can’t see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ slot machine games near any exits.
An additional classic rule is that loose slots are located on the major aisles inside the casinos, again so that more folks could see winning jackpots and be roused to play. Importantly 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!
Today, casinos are constantly changing their philosophy about where to place the loose slot machine games.