updated using info in this thread - Stockton Folk club is it 50 years?
http://mudcat.org/thread.cfm?threadid=142693&messages=10



San Francisco Folk Music Club (US)- founded 1948
Bush Music Club (Aus) - founded 1954 - headed to 60
Topic in Bradford (UK) - founded 1956 - 55 in 2011
The Folksong Society of Greater Boston (US) - 1959
Victorian Folk Music Club (Aus) - 1959
Swindon Folksingers Club (UK) - founded Jan 1960 - 51 years old
Stockton folk club (UK) - founded 1962 - 50 next year
Birtley Folk Club - founded 1962 - 50 next year
Herga (UK) - heading to 50 in a couple of years
The Pick'n & Sing'n Gather'n (US - NY state) - pushing 50
Cutty Wren Folk Club, Redcar (UK) Started 1965,
Black Diamond Folk Club, Birmingham (UK) - 48 next year
Southport's Bothy Folksong Club (UK) - 46 later this month
Orpington Folk Club (UK) - founded 1965
Whitby (UK) - similar age to Orpington
Folklore Society Of Greater Washington (US) - 'only' 45½
Croydon Folk Club (UK) - founded 1967 - 44 in 2011
Durham City Folk Club - founded 1969
Calgary Folk Club (Can)- founded 1972 - 40 next year
Islington Folk Club (UK) - founded 1972
Somers Traditional Folk Club (UK) - just celebrated 30 years
Llantrisant Folk Club (UK) - founded 1980.

Newtongrange Folk Club (UK) - spiritual descendent of Music Club active in the late 1870s!