RE: Char Grill
I ate MANY burgers at Char-Grill when I lived in Cary from 1987-1999. The big burger that they now call hamburger steak was then the 'Steak Sandwich" and the smaller was "Steak Jr".
No inside seating (a couple of picnic tables outside). Pick up a small menu slip, mark the sandwich, dressings and sides you want, watch them plop the fresh meat on the charcoal grill and wait for your number to be called when your order is ready to pick up at the window. It ranks among the best, and probably is the very best, burger that I have ever had. That half-pounder is one helluva meal.