Conversation so far:
What is Tin Pan Alley?
The name originally referred to a specific place: West 28th Street between Fifth and Sixth Avenues in the Flower District of Manhattan.
What did George Gershwin do in Tin Pan Alley?
George Gershwin found his first job as a song plugger.
What is a song plugger?
A song plugger or song demonstrator was a vocalist or piano player employed in the early 20th century to sell new sheet music.

Question: Did he do broadway shows
Self-contained rewrite: Did George Gershwin do broadway shows?