Volumes have been said on this matter, and the debates and discord about where the "hot" video slots are placed in a casino are still intense – 60 years after slot machines were 1st placed in the casinos.
The classic rule is that the superior slots were installed just inside the main entrance of the casino; so that everyone walking by would see jackpot winners and be mesmerized enough to come into the casino and play. Our conviction is that this is definitely no longer so.
Almost all of the major casinos presently are humongous complexes … it’s no longer possible to see inside from the sidewalk, so there’s no longer a reason to have the ‘loose’ slot games near to any exits.
An additional classic rule is that loose slot machine games are placed on the major aisles inside the casinos, again so that more potential players could see winning jackpots and be energized to play. Importantly however, we find that this also is no longer a universal rule.
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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slots.