Volumes have been written on this subject, and the debates and discord about where the "hot" slot games are located in a casino are still on-going – more than sixty years after slot games were first added to the gaming floor in gambling houses.
The standard rule is that the most favorable slots were positioned just inside the main doorway of the casino; so that fun seekers walking by would see real jackpot winners and be aroused to come unto the gambling floor and play. Our view is that this is definitely no longer so.
Just about all of the big name casinos today are behemothic complexes and you no longer can see inside from the sidewalk, so there’s no longer a reason to position the ‘loose’ slots close-by any doors.
An additional traditional rule is that loose slot games are positioned on the major aisles in the casinos, again so that more people could see winning jackpots and be encouraged 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!
These days, casinos are constantly changing their perspective about where to place the loose one armed bandits.