Question: What traditional folk song was a single on Here We à Go Go Again?

Context paragraphs:
The Seventh Son: "The Seventh Son" (also listed as "Seventh Son") is a blues song written by Willie Dixon.  The title refers to the seventh son of a seventh son of folklore, which Dixon referenced previously in his "Hoochie Coochie Man".  In 1955, Willie Mabon was the first to record it, which was released as a single by Chess Records.  Johnny Rivers recorded the song as the lead track for his album "Meanwhile Back at the Whisky à Go Go" (1965), which was also one of his most popular singles.

À gogo movement: The À Gogo movement (also spelled àu gogo, a gogo, a go-go, or à go•go) started in postwar France and quickly spread throughout western Europe, most notably in the United Kingdom, Switzerland, and Italy.  The name derives from the French term à gogo (in abundance, galore).  It is considered a continuation of café society, who were also wealthy socialites and prominent members of the arts and sciences. Participants were often referred to as "the go crowd", "the in crowd" and later as "the jet set".  These are terms created and applied by the media to identify people of certain mindset and do not refer to any formal organization.  To put the movement in context, it should be considered an aspect of social behavior existing under the overarching movement of post World War II modernism.

Meanwhile Back at the Whisky à Go Go: Meanwhile Back at the Whisky à Go Go was Johnny Rivers's fourth official album, and was his 3rd recorded live at the Whisky a Go Go in Los Angeles.  The album reached #21 on the "Billboard" charts and Rivers' version of "Seventh Son" peaked on the Billboard charts at #7.

Go Go Go (Sleeping with Sirens song): "Go Go Go" is a song performed by American post-hardcore band Sleeping With Sirens released for digital download on January 22, 2015.  It serves as the second single off of the group's fourth studio album, "Madness", which was released on March 13, 2015 via Epitaph Records and follows up the album's lead single, "Kick Me."  The music video for "Go Go Go" was self-directed by Sleeping With Sirens and shot by Sean Garcia of Flippen Music, which premiered on the single's release day.

Shimmy a Go Go (song): "Shimmy a Go Go" is single from Australian pop punk band Short Stack, released on 27 October 2008, from their "Shimmy a Go Go" EP, and their then upcoming album "Stack Is the New Black".  "Shimmy a Go Go" peaked at #31 on the ARIA Singles Chart.  Shaun Diviney stated in a radio interview that he wrote the song during his final year in high school and it is about partying and having a good time.

At the Whisky à Go Go: Johnny Rivers at the Whisky à Go Go (shown as "At Whisky-A-Go-Go" on the original label) is a live album and is the debut album from American rock and roll singer/songwriter/guitarist Johnny Rivers.

Midnight Special (song): "Midnight Special" is a traditional folk song thought to have originated among prisoners in the American South.  The title comes from the refrain, which refers to the passenger train "Midnight Special" and its "ever-loving light" (sometimes "ever-living light"):

Contemporary folk music: Contemporary folk music refers to a wide variety of genres that emerged in the mid 20th century and afterwards which were associated with traditional folk music.  Starting in the mid-20th century a new form of popular folk music evolved from traditional folk music.  This process and period is called the (second) folk revival and reached a zenith in the 1960s.  The most common name for this new form of music is also "folk music", but is often called "contemporary folk music" or "folk revival music" to make the distinction.  The transition was somewhat centered in the US and is also called the American folk music revival.  Fusion genres such as folk rock, folktronica, and others also evolved within this phenomenon.  While contemporary folk music is a genre generally distinct from traditional folk music, it often shares the same English name, performers and venues as traditional folk music; even individual songs may be a blend of the two.

Here We à Go Go Again!: Here We à Go Go Again!  is Johnny Rivers's second official album, and like his first album, "At the Whisky à Go Go", it was recorded live at the Whisky a Go Go in Los Angeles, California.  The album reached #38 on the Billboard Charts and spawned two hit singles: "Maybellene" and "Midnight Special".

The House of the Rising Sun: "The House of the Rising Sun" is a traditional folk song, sometimes called "Rising Sun Blues".  It tells of a life gone wrong in New Orleans; many versions also urge a sibling to avoid the same fate.  The most successful commercial version, recorded in 1964 by British rock group the Animals, was a number one hit on the UK Singles Chart and also in the United States and France.  As a traditional folk song recorded by an electric rock band, it has been described as the "first folk-rock hit".

Supporting paragraphs: Here We à Go Go Again! Midnight Special (song)
Answer: Midnight Special