Question: In what neighborhood of Lower Manhattan is the park where The Greenbriar Boys first got together in jam sessions located?

Context articles: Robert Shelton (critic)
Volto!
The Narrative discography
Backspacer
Park Place Gallery
Sujeito a Guincho
Washington Square Park
The Greenbriar Boys
Madalaine
List of songs recorded by The Narrative

Robert Shelton, born Robert Shapiro (June 28, 1926, Chicago, Illinois, United States – December 11, 1995, Brighton, England) was a music and film critic.
 Shelton was perhaps most notable for the way in which he helped to launch the career of a then unknown 20-year-old folk singer named Bob Dylan.
 In 1961, Dylan was performing at Gerdes Folk City in the West Village, one of the best-known folk venues in New York, opening for a bluegrass act called the Greenbriar Boys.
 Shelton's positive review, in "The New York Times", brought crucial publicity to Dylan, and led to a Columbia recording contract.
 Shelton had previously noted Dylan in a review for the New York Times of WRVR's live twelve-hour Hootenanny, July 29th, 1961.
 “Among the newer promising talents deserving mention are a 20-year-old latter-day Guthrie disciple named Bob Dylan, with a curiously arresting mumbling, country-steeped manner".
 This was Dylan's first live radio performance.
Volto!
 (often stylized VOLTO!)
 is an American rock jam band, based in Los Angeles, California, United States.
 First formed in the early 2000s, the current band roster consists of Lance Morrison on bass, Danny Carey (of Tool) on drums, and John Ziegler on guitars. Carey and Ziegler played together in Pigmy Love Circus and in jam sessions at a jazz club in Southern California's San Fernando Valley with Morrison.
 Though the three musicians often played jazz fusion during the sessions, their music evolved to a sound more like progressive rock, as evidenced on their debut release "Incitare".
The discography of The Narrative, an American indie pop band from Long Island, New York, that have recorded one studio album, three extended plays and one b-side album.
 The band first got together after Suzie Zeldin answered a Craigslist ad put up by Jesse Gabriel in 2006.
Backspacer is the ninth studio album by the American alternative rock band Pearl Jam, released on September 20, 2009.
 The bandmembers started writing instrumental and demo tracks in 2007, and got together in 2008 to work on an album.
 It was recorded from February through April 2009 with producer Brendan O'Brien, who had worked on every Pearl Jam album except their 1991 debut "Ten" and 2006's self-titled record—although this was his first production credit since 1998's "Yield".
 Material was recorded in Henson Recording Studios in Los Angeles, California and O'Brien's own Southern Tracks Recording in Atlanta, Georgia.
 The music on the album—the shortest of the band's career—features a sound influenced by pop and new wave.
 The lyrics have a more optimistic look than the ones in the politic-infused predecessors "Riot Act" and "Pearl Jam", something frontman Eddie Vedder attributed to the election of Barack Obama.
Park Place Gallery was a contemporary art gallery located in SoHo in Lower Manhattan, New York City, United States, during the mid-to-late 1960s.
 Park Place Gallery was located at 542 West Broadway, on what is now LaGuardia Place just north of Houston Street in the neighborhood that is now called "SoHo".
 It is thought of as being the first gallery of the 1960s in that area of Lower Manhattan.
Sujeito a Guincho is a clarinet sextet from São Paulo, Brazil.
 It started as a quartet, featuring Sérgio Burgani, Edmilson Nery, Luca Raele and Luiz Afonso Montanha, music professors who teach in and around the city of São Paulo while playing in the country’s top orchestras, such as the Orquestra Sinfônica do Estado de São Paulo (OSESP) and the Orquestra Sinfônica Municipal (OSM).
 They first got together in 1991, eager to expand the music repertoire available for their instrument.
Washington Square Park is a 9.75 acre public park in the Greenwich Village neighborhood of Lower Manhattan, New York City.
 One of the best known of New York City's 1,900 public parks, it is a landmark as well as a meeting place and center for cultural activity.
 It is operated by the New York City Department of Parks and Recreation.
The Greenbriar Boys were a northern bluegrass music group who first got together in jam sessions in New York's Washington Square Park.
 Along with the New Lost City Ramblers, their urban traditional country sound inspired a generation of musicians and fans.
"Madalaine" the debut single by American rock band Winger, from their self-titled debut album "Winger".
 Released in 1988, the song reached #27 on the Mainstream rock "Billboard" charts.
 According to Kip Winger, it was one of the first four songs he and band mate Reb Beach wrote when they first got together, based on a handful of riffs Reb had from when he was younger.
 Kip figured out how best to arrange the riffs, enabling the pair to complete the song.
The following is a list of songs by the American Indie pop band The Narrative that have recorded one studio album, three extended plays and one b-side album.
 The band first got together after Suzie Zeldin answered a Craigslist ad put up by Jesse Gabriel in 2006.