Books have been said on this matter, and the debates and squabbling about where the "hot" slot machine games are positioned in the casino are still on-going – over sixty years after slot games were 1st added to the gaming floor in gambling dens.
The traditional rule is that the more favourable slot machine games were installed just inside the entry of the casino; so that everyone going by would be able to see real jackpot winners … be mesmerized enough to come inside … play. Our slant is that this is no longer true.
Practically all of the mega casinos nowadays are super-colossal complexes … you can no longer see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slot machines near to any doorways.
An additional standard rule is that loose slot machine games are positioned on the major aisles in the casinos, again so that more folks could see winning jackpots and be influenced to play. Nonetheless, we find that this also is no longer a universal rule.
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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slot machines.