Books have been said on this subject, and the debates and interchanges about where the "hot" video slots are installed in a casino are still happening – over sixty yrs after one armed bandits were 1st installed in casinos.
The standard rule is that the very best slot machine games were put just inside the door of the casino; so that persons walking by would be able to see jackpot winners and be enthralled to come into the casino and play. Our position is that this is no longer true.
Practically all of the mega casinos today are magnificent complexes … you no longer can see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slots near to any exits.
An additional traditional rule is that loose slots are located on the major aisles inside the casinos, again so that more people could see winning jackpots and be motivated to play. 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 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 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!
These days, casinos are constantly changing their perspective about where to place the loose slot games.