Thanks for the write-up, vp. Burger Chef jokes aside, you've got me interested in the goings-on of the Lyric Piano Building. Part of me hopes the new owner keeps the Burger Chef art. When I visited Berlin in the mid-90s, they had this cool club called "Obst und Gemuese" (Fruits and Vegetables) in the former East Berlin. It got its name because the building used to be a produce market and the folks who turned it into a club decided to keep the old sign out front.
As far as the Lyric Piano Company itself goes, acccording to this website and Northern Illinois University
, it looks like a Lyric Piano Co. was in existence at least from 1909-1937, dissolving in 1937 (look at the listing for Box 1, Roll 2 of Wurlitzer Co. Records Microfilms in the collection inventory). Without looking at the microfilms (or the original documents supposedly donated to the Smithsonian), we can't be sure if it's the Lyric Piano Co. you are looking for. That's the best I got.