Source : Webster's Revised Unabridged Dictionary (1913)

Grillroom \Grill"room`\, n.
   A room specially fitted for broiling food, esp. one in a
   restaurant, hotel, or club?house, arranged for prompt
   service.

Source : WordNet®

grillroom
     n : a restaurant where food is cooked on a grill [syn: {grill}]