Books have been stated on this item, and the disquiet and discord about where the "hot" slot machine games are installed in the casino are still intense – 60 yrs after slot games were first installed in the casinos.
The quintessential rule is that the more favourable one armed bandits were located just inside the entry of the casino; so that folks passing by would see real jackpot winners and be enthralled to come into the casino … play. Our conviction is that this is definitely no longer true.
Most of the big name casinos nowadays are giant complexes and now you can’t see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ one armed bandits close to any doorways.
An additional standard rule is that loose slot games are installed on the major aisles in the casinos, again so that more potential gamblers could see winning jackpots and be galvanized to play. Nonetheless, 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 the 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 philosophy about where to place the loose slots.