In the movie "Wings" from 1927, with Clara Bow and Charles Rogers, they
have a party in Paris, and these men wheel in a small piano with a
handle in the side.  Everybody started dancing like crazy when they
rode that thing in on a cart!

The movie is GREAT if you get a chance to see it.  It's silent, but my
local video store had the copy which has Gaylord Carter on the Mighty
Wurlitzer of some theater in Hollywood, CA.  It's so great!  Especially
with surround sound!

Damon Atchison
Damon66@juno.com