Books have been set forth on this issue, and the conflict and disharmony about where the "hot" video slots are placed in the casino are still ongoing – more than sixty years after slots were 1st placed in gambling dens.
The traditional rule is that the better one armed bandits were positioned just inside the main entrance of the casino; so that potential players going by would be able to see real jackpot winners and be intrigued enough to come unto the gaming floor … play. Our interpretation is that this is no longer the case.
The majority of the large casinos presently are herculean complexes and you can no longer see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slot machines close to any exits.
Another traditional rule is that loose slots are positioned on the major aisles inside the casinos, again so that more potential players could see winning jackpots and be influenced to play. Notably though, 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 slots 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!
Today, casinos are constantly changing their perspective about where to place the loose one armed bandits.