Books have been stated on this issue, and the contention and face-offs about where the "hot" video slots are installed in a casino are still intense – sixty years after slot machines were first placed in the casinos.
The traditional rule is that the best slots were installed just inside the main entryway of the casino; so that casino fanatics passing by would see real jackpot winners … be infatuated enough to come inside and play. Our disposition is that this is definitely no longer the case.
The great majority of the mega casinos these days are behemothic complexes … you no longer can see inside from the sidewalk, so there’s no longer a reason to place the ‘loose’ slot machines close to any exits.
Another classic rule is that loose slots are placed on the major aisles inside the casinos, again so that more potential players could see winning jackpots and be influenced to play. 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 one armed bandits 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 slot machine games.