Reader Question: What is that style name?

Anne wrote in asking me if I knew if there was an official name for this type of 360 degree sofa that has been a staple of gathering rooms, hotels, theaters etc. They were particularly popular during the late Victorian period, but have been around much longer and are still used, in differing shapes and styles.

Architectural Digest Emmy Green Room, 2006, designers Matthew White and Frank Webb

The White House East Room, circa 1900, image courtesy of New York Public Library

The White House Blue Room, circa 1855, computer generated image courtesy Conde Nast

So the question is - is there a name for this style? I've done research and can't come up with anything more descriptive than "circular foyer sofa". Anyone know?