Slot Machine positioning
Books have been stated on this issue, and the controversy and ruckus about where the "hot" slot games are installed in the casino are still there – over sixty yrs after the slots were first installed in the casinos.
The traditional rule is that the very best slot machine games were positioned just inside the main entry of the casino; so that potential gamblers walking by would be able to see jackpot winners … be convinced to come inside and play. Our finding is that this is no longer true.
Nearly all of the mega casinos presently are behemothic complexes and it’s no longer possible to see inside from the sidewalk, so there is no longer a reason to position the ‘loose’ slot games near to any entrances.
Another traditional rule is that loose slots are put on the major aisles inside the casinos, again so that more potential gamblers could see winning jackpots and be inspired to play. Importantly 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 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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slot machine games.

