A folk club is a regular event, permanent venue, or section of a venue devoted to folk music and traditional music. Folk clubs were primarily an urban phenomenon of 1960s and 1970s Great Britain and Ireland, and vital to the second British folk revival, but continue today there and elsewhere. In America, as part of the American folk music revival, they played a key role not only in acoustic music, but in launching the careers of groups that later became rock and roll acts. From the end of the Second World War there had been attempts by the English Folk Dance and Song Society in London and Birmingham to form clubs where traditional music could be performed. A few private clubs, like the Good Earth Club and the overtly political Topic Club in London, were formed by the mid-1950s and were providing a venue for folk song, but the folk club movement received its major boost from the short-lived British skiffle craze, from about 1955 to 1959, creating a demand for opportunities to play versions of American folk, blues and jazz music, often on assorted acoustic and improvised instruments. This included, as the name suggests, the 'Ballad and Blues' club in The Round House, Wardour Street, Soho, co-founded by Ewan MacColl, although the date and nature of the club in its early years is disputed. As the craze subsided from the mid-1950s many of these clubs began to shift towards the performance of English traditional folk material, partly as a reaction to the growth of American dominated pop and rock n’ roll music. The Ballad and Blues Club became the ‘Singer Club’ and, in 1961 moved to the Princess Louise pub in Holborn, with the emphasis increasingly placed on English traditional music and singing the songs of one's own culture, e.g. English singers should avoid imitating Americans and vice versa, using authentic acoustic instruments and styles of accompaniment. This led to the creation of strict 'policy clubs', that pursued a pure and traditional form of music. This became the model for a rapidly expanding movement and soon every major city in Britain had its own folk club.