Volumes have been stated on this topic, and the contention and discussion about where the "hot" video slots are placed in the casino are still passionate – over sixty yrs after the slot machines were 1st added to the gaming floor in casinos.
The classic rule is that the best slot machine games were located just inside the main entrance of the casino; so that everyone walking by would see actual jackpot winners … be infatuated enough to come into the casino and play. Our point of view is that this is definitely no longer true.
Most of the mega casinos nowadays are monstrous complexes … you no longer can see inside from the sidewalk, so there’s no longer a reason to position the ‘loose’ slot machine games close to any entrances or exits.
Another standard rule is that loose slots are installed on the major aisles in the casinos, again so that more potential players could see winning jackpots and be roused to play. Interestingly though, 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 slot games 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 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.