Although Seeger and the Weavers were also banned from NBC and CBS variety shows, the Hootenanny issue rankled because Seeger and his long-time associate Woody Guthrie were the first to popularize the term ‘hootenanny’ as a gathering of folk musicians. Seeger encouraged his fellow artists not to boycott but to accept Hootenanny invitations, so as to promote the popularity of the folk genre. Nevertheless, by the end of March three other folk acts had joined Joan Baez in boycotting the show: Tom Paxton, Barbara Dane and The Greenbriar Boys, a bluegrass trio. Some weeks later, Guthrie disciple Ramblin' Jack Elliott announced he, too, was boycotting Hootenanny. Over the years, other arguably better-known folk performers have been associated with the Hootenanny boycott; these include Dylan (who mentioned the show in his song "Talkin' John Birch Paranoid Blues"), Peter, Paul & Mary, Phil Ochs and The Kingston Trio. However, the ones who specifically announced their participation in the boycott at the time were Joan Baez, Barbara Dane, Tom Paxton, Ramblin' Jack Elliott and The Greenbriar Boys. The Greenbriar Boys eventually appeared on the October 19, 1963, broadcast, backing Los Angeles folk and country singer Dian James. However, John Herald, the band's guitarist and lead vocalist, did not participate. Some artists who had performed on the show would refuse future Hootenanny appearances for creative, rather than political, reasons; these include Judy Collins and Theodore Bikel. With the expansion of Hootenanny to one hour weekly, effective with the broadcast of September 21, 1963, the producers made overtures to Pete Seeger. However, there was a caveat, spelled out in a letter from network executives: "ABC will consider Mr. Seeger’s use on the program only if he furnishes an affidavit as to his past and present affiliations, if any, with the Communist Party, and/or with the Communist front organizations. Upon so doing, the company will undertake to consider his statement in relation to all the objective data available to it, and will advise you promptly [if] it will approve the employment of Mr. Seeger." Seeger, naturally, refused to provide anything that smacked of a loyalty oath, and his manager, Harold Leventhal, made the story public - which only encouraged others to refuse appearances. Cancellation ABC tentatively renewed Hootenanny for a third season, but a major shift in popular music brought about a last-minute reversal. The 1964 British Invasion eclipsed the folk music craze among younger viewers,