The Chinoiserie Entryway

Timothy Whealon

Do you call this room an entry, entryway, entrance, entrance hall, or foyer?
And what about coffee table or cocktail table?
Or couch versus sofa?
Curtains or draperies?
I thought about this yesterday when a blogger was talking about a powder bath which I had never heard for powder room.
I wonder if these different terms are regional?