Legion of Mary "Freedom Jazz Dance"

Jam band jazz, at it's best.  This is the band Legion of Mary, led by Jerry Garcia, performing "Freedom Jazz Dance" composed by tenor saxophonist Eddie Harris, who was the first artist to electrically amplify a saxophone, and also played keyboards (electric piano, and organ).  Miles Davis recorded "Freedom Jazz Dance" in 1966.  Garcia's cover with Legion of Mary is taken from a concert at The Bottom Line in New York City, from the band's early show on April 9th, 1975.  The band is:

Jerry Garcia: guitar & vocals
Merl Saunders: keyboards & vocals
John Kahn: bass
Martin Fierro: saxophone & flute
Ron Tutt: drums