Question: What below an influential music venue which changed little until its closure featured an American folk singer-songwriter who has had a music career spanning more than fifty years ?

Context paragraphs:
Georgia Theatre: Georgia Theatre is a live music venue and event space in Athens, Georgia.  Many prominent national and local acts across all genres have performed at the Theatre, including rock, folk, country, indie, alternative, hip hop and electronic.  The venue is on the Athens Music History Walking Tour sponsored by the Athens Convention and Visitors Bureau.  Georgia Theatre opened as a music venue in 1978, but spent a few years in the early 1980s operating sporadically as a movie house.  It was reopened as a music venue in 1989 and has since hosted many of the major touring acts that come through the state.

Oscar Brand: Oscar Brand (February 7, 1920 – September 30, 2016) was a Canadian-born American folk singer-songwriter and author.  In his career, spanning 70 years, he composed at least 300 songs and released nearly 100 albums, among them Canadian and American patriotic songs.  Brand's music ran the gamut from novelty songs to serious social commentary and spanned a number of genres.  He also wrote a number of short stories.

Gerde's Folk City: Gerdes Folk City (sometimes spelled Gerde's Folk City) was a music venue in the West Village, part of Greenwich Village, Manhattan, in New York City.  Initially opened as a restaurant called Gerdes, by owner Mike Porco, it eventually began to present occasional incidental music.  First located at 11 West 4th Street (in a building which no longer exists), it moved in 1970 to 130 West 3rd Street.  It closed in 1987.  On January 26, 1960, Gerdes turned into a music venue called The Fifth Peg, in cooperation with Izzy Young, the director of the Folklore Center.  The Fifth Peg's debut bill was gospel folk singer Brother John Sellars and Ed McCurdy, writer of the anti-war classic "Last Night I Had the Strangest Dream".  Porco and Young had a falling-out, and on June 1, 1960, Gerdes Folk City was officially born with a bill featuring folksingers Carolyn Hester and Logan English.  At this time Gerdes Folk City was booked by a folk enthusiast Charlie Rothschild (who later became Judy Collins' longtime manager) and English.  Gerdes Folk City was suddenly one of the central music venues of the era.  It became one of the most influential American music clubs, before finally losing its lease in 1987. " "Rolling Stone" Book of Lists" called Folk City one of the three top music venues in the world, along with The Cavern and CBGB.  Folk City helped to launch the careers of several world-renowned musical stars from Bob Dylan to Sonic Youth, and showcased numerous music styles from folk to alternative rock.

List of works by Tom Paxton: Tom Paxton (born October 31, 1937) is an American folk singer-songwriter who has had a music career spanning more than fifty years.  In 2009, Paxton received a Grammy Lifetime Achievement Award.  He is noteworthy as a music educator as well as an advocate for folk singers to combine traditional songs with new compositions.

Tom Paxton: Thomas Richard Paxton (born October 31, 1937) is an American folk singer-songwriter who has had a music career spanning more than fifty years.  In 2009, Paxton received a Grammy Lifetime Achievement Award.  He is noteworthy as a music educator as well as an advocate for folk singers to combine traditional songs with new compositions.

Gil Turner: Gil Turner (born Gilbert Strunk; May 6, 1933 – September 23, 1974) was an American folk singer-songwriter, magazine editor, Shakespearean actor, political activist, and for a time, a lay Baptist preacher.  Turner was a prominent figure in the Greenwich Village scene of the early 1960s, where he was master of ceremonies at New York's leading folk music venue, Gerde's Folk City, as well as co-editor of the protest song magazine "Broadside".  He also wrote for "Sing Out! ", the quarterly folk music journal.

Fifty Years of Freedom: Fifty Years of Freedom: A Study of the Development of the Ideas of A. S. Neill is a 1972 intellectual biography of the British pedagogue A. S. Neill by Ray Hemmings.  It traces how Homer Lane, Wilhelm Reich, Sigmund Freud and others influenced Neill as he developed the "Summerhill idea", the philosophy of child autonomy behind his Summerhill School.  The book follows Neill's early life and career in rural, Calvinist Scotland and continues through the influence of his mentors, Lane and Reich, and the origins of Summerhill after World War I. Written fifty years from Summerhill's founding, "Fifty Years" is a sociological and historical analysis of Neill's ideas in the context of intellectual and educational trends both during Neill's life and at the time of publication.  Hemmings also surveyed progressive school leaders about Neill's impact on the field, and reported their perception of influence on teacher–pupil relations.  "Fifty Years" was first published in England in 1972 by George Allen and Unwin, and was later renamed Children's Freedom: A. S. Neill and the Evolution of the Summerhill Idea for its 1973 American publication by Schocken Books.

Rosalie Sorrels: Rosalie Sorrels (June 24, 1933 – June 11, 2017) was an American folk singer-songwriter.  She began her public career as a singer and collector of traditional folksongs in the late 1950s.  During the early 1960s she left her husband and began traveling and performing at music festivals and clubs throughout the United States.  She and her five children traveled across the country as she worked to support her family and establish herself as a performer.  Along the way she made many lifelong friends among the folk and beat scene.  Her career of social activism, storytelling, teaching, learning, songwriting, collecting folk songs, performing, and recording spanned six decades.

Dave Carter: Dave Carter (August 13, 1952 – July 19, 2002) was an American folk singer-songwriter who described his style as "post-modern mythic American folk music."  He was one half of the duo Dave Carter and Tracy Grammer, who were heralded as the new "voice of modern folk music" in the months before Carter's unexpected death in July 2002.  They were ranked as number one on the year-end list for "Top Artists" on the "Folk Music Radio Airplay Chart" for 2001 and 2002, and their popularity has endured in the years following Carter's death.  Joan Baez who went on tour with the duo in 2002 spoke of Carter's songs in the same terms that she once used to promote a young Bob Dylan:

Bunjies: Opened in 1953 or 1954, and one of the original "folk cafés" of the 1950s/1960s, Bunjies Coffee House & Folk Cellar was situated at 27 Litchfield Street (just off Charing Cross Road), London WC2.  Below the café, in a 400-year-old wine cellar, was an influential music venue which changed little until its closure (and conversion of the premises into a restaurant) in 1999.  Allegedly named after the first owner's pet hamster, the venue featured, early in their careers, Tom Paxton, John Renbourn, Bert Jansch, Bob Dylan and Paul Simon.  Al Stewart secured a residency at the Folk Cellar in 1965, at the age of 19, which was a significant factor in his later success.

Supporting paragraphs: Bunjies Tom Paxton
Answer: a 400-year-old wine cellar