Celeste, I'm not sure if you saw my late comments about Chateaubriand and steak frites in a thread below. So here they are:
I know they do the Hanger Steak at lunch. I'm NOT sure they have it on the dinner menu. I know that the dinner menu has the Chateaubriand and the Porterhouse per deux, a New York Strip and a Filet as the steak options.
You'd better call and check on availability if lunch isn't doable.
I LIKED their pomme frites but they weren't exactly
what I remember from Paris.