Volumes have been set forth on this topic, and the debates and discussion about where the "hot" video slots are positioned in the casino are still happening – 60 yrs after slot machines were 1st installed in casinos.
The classic rule is that the very best one armed bandits were installed just inside the main entry of the casino; so that potential players going by would be able to see real jackpot winners … be convinced to come into the casino and play. Our point of view is that this is not so anymore.
The majority of the mega casinos today are humongous complexes and it is not possible to see inside from the sidewalk, so there is no longer a reason to have the ‘loose’ one armed bandits close to any doorways.
Yet another standard rule is that loose slot games are positioned on the major aisles in the casinos, again so that more potential players could see winning jackpots and be influenced to play. Notably though, we find that this also is not 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!
In recent times, casinos are constantly changing their perspective about where to place the loose slot games.