We belong to the Federation of Guitar Societies:
http://www.federationofguitarsocieties.org.uk
There are more of them than you might think - here is a map of their locations:
https://maps.google.co.uk/maps/ms?msid=214953340386177529485.0004e033095564c6964fd&msa=0&ll=51.616311,-0.4422&spn=1.468363,4.22699