I have taught many day schools for the WEA.
Some of these have been on the works of a particular composer, e.g. Chopin or Mahler.
Sometimes they have been on a particular set of musical works, e.g. Schubert Piano Music; Bach Preludes and Fugues; Beethoven Piano Sonatas.
Sometimes they have been on a particular work and included a live performance, e.g. Bach Goldberg Variations.
Do get in touch if your organisation would be interested in hosting a Day School on a musical subject. There is no need for this to be organised through the WEA; a local organisation could easily do it on a freelance basis.