Interesting Fact No.3

That American casinos use some interesting features to keep gamblers gambling:

• a lack of clocks and natural daylight in order to make the gambler lose track of time
• music on a loop and not individual tracks in order to maintain "a womb-like atmosphere" that induces a trance like state
  
• free alcoholic drinks and nibbles to keep you furnished at the tables/machines
• extra oxygen and sometimes pheremones can be pumped in for alertness and aggressiveness
• near misses

Full story here