Is it incredibly gauche to order Peking duck, and ask to take what’s left of the carcass home with you? It seems to depend on how the duck is served by the restaurant. Robert Lauriston has been served Peking duck, three style, where the crispy skin is served with crepes or buns, the meat is used in another dish with vegetables, and the bones are used for a soup. With this service, nothing of value would be left.
As Melanie Wong says, one can always ask. It may not be an accepted practice at the restaurant, and they can always refuse, or tell you there’ll be an additional charge.
Peking Duck: Can I Ask For the Carcass?