The Chamber Music Society of St. Louis programmed their final show of an exciting season around the date of the concert, May 4, as in, may the 4th be with you. There were a lot of 4s and quartets. The first half of the concert paired two compositions that counted as an Opus 4: Arcangelo (coolest name, ever) Corelli’s Sonata a Quattro for Trumpet and Strings and Benjamin Britten’s Simple Symphony, Op. 4.