Fatburger is also from L.A.  Fatburger as in "Man! That's Phat!"  I love them with all 4 extras.  Chili, Bacon, Egg and Cheese.  Yum!  The one in O.C is in the Park Place area.

Directions: 405 to Jamboree, turn right from the exit toward Newport. Turn left at Michaelson, the first light and left again at the next light which is into the Park Place area