This was not a musical, but I remember watching an old movie, probably on Turner Classics, B&W, that at one point had the hero, perhaps back from war, pick up his clarinet and get on stage and play at a town festival (outdoor setting
at night in a typical movie small town). There was a phenomenal
boogie woogie piano performance in that scene, a long multi chorus
deal that really just keeps sticking with me, and I really want to
find the movie and check that scene out again and find out who the
pianist was. Any ideas? Thanks.