Conversation so far:
What was George M. Cohan's most notable accomplishment in his later career?
Known in the decade before World War I as the man who owned Broadway, George M. Cohan is considered the father of American musical comedy
What about George M. Cohan's family or grandkids?
What did George M. Cohan enjoy doing?
George M. Cohan enjoyed his first Broadway success with “Little Johnny Jones” in 1904.

Question: Are there any other interesting aspects about this article?
Self-contained rewrite: Are there any other interesting aspects about George M. Cohan besides enjoying his first Broadway success with Little Johnny Jones?