The greatest gambling system of all time, from Bells Are Ringing.
We'll be rich! We'll be rich! We'll be riiiiicch!
Of course the authors of Bells Are Ringing, Betty Comden and Adolph Green, knew that Beethoven's sixth symphony is not his Opus 3. A major plot point hinges upon the fact that some of these "bets" don't co-relate to real pieces of music.
I think my favorite composer/racetrack correlation (apart from the Handel one, which was probably the whole point of doing this subplot in the first place) is "Sibelius is Sportsman's Park."