Books have been stated on this item, and the debates and face-offs about where the "hot" video slots are located in a casino are still on-going – more than sixty years after the slot machines were 1st placed in the casinos.
The traditional rule is that the best slot machines were positioned just inside the entrance of the casino; so that persons passing by would be able to see jackpot winners and be impressed enough to come unto the gaming floor and play. Our frame of mind is that this is definitely no longer so.
Most of the large casinos these days are mammoth complexes … it is not possible to see inside from the sidewalk, so there is no longer a reason to position the ‘loose’ slots near any entrances or exits.
Yet another classic 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 roused to play. Importantly however, 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 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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slot games.