This Joint Is Jumpin' celebrates the exemplary life and work of the greatest of jazz entertainers. Fats started playing church organ at age 10 and his musical career ended at the age of 39. He wrote over 950 tunes, many of them sold for "beer-money" to greedy music publishers. He touched a whole generation of fellow musicians with his extraordinary piano style, notably the strong left hand of stride. He played the "classics", the Three Bs (Bach, Beethoven & Brahms) at Carnegie Hall. He appeared in movies like Stormy Weather with Lena Horne and Bill Bojangles Robinson; & Hooray For Love. He played private parties for gangsters like Al Capone & Hollywood royalty like Humphrey Bogart. But most of all, he partied. This film features his son, Maurice Waller, and fellow musicians Eddie Barefield, Sammy Price and Marshal Royal. Paul Machlin talks about stride and Andy Razaf's widow,! Jean Hutson, remembers him.