In my secondary school, all Year 7 - 9 pupils have a music lesson every week. They learn music theory and have a chance to try composition etc. (I'm not a music teacher but I do run a choir of sorts.)
With the support of our headteacher, we have concerts for the whole community as often as my stamina allows. The artist(s) perform to anyone who wants to buy a ticket in the evening but I try to have a session in the afternoon for smallish groups of pupils who are vaguely interested. These have included: Y7 pupils hugely enjoying a mini-concert from Tanglefoot, GCSE pupils singing in French and Spanish with Flossie, Y9 leaning about song writing from Jez Lowe and a largish group of Y9's doing an Irish dance workshop with Damhsa.
I would rate our folk club as successful but rather exclusive so this is a good way of bring live music into the school and local community. (I try not to use the word "folk"!)
I don't really want to try to enforce change on the club. Afterall, it is a club for its members and it supplies what they want at the moment, even if it may not always be what I might want.