What makes a small village choral society survive for nearly 120 years?

Details of the very early years, sadly have become lost in the mists of time. Some sources record that the society was formed out of the “church choir” (presumably St. Mary’s Church, Shalford) however  the Leith Hill Musical Festival’s publication “Music Won The Cause” suggests that the choir was formed “ in order to participate in the first Leith Hill Music Festival”