The Mob Hideout is a meeting place for the mob.
The Dark KnightEdit
After robbing a mob bank, The Joker comes here to propose his plans to the leaders of the mob. After his arrival, one of Gambol's men grabs The Joker and Joker proceeds to kill him by a "magic trick". Joker offers to kill the Batman and warns the mob leaders about Lau's ureliability.