The album's title refers to the impromptu, sometimes late-night, jam sessions pursued by touring musicians when on the road.

In the liner notes, Delaney Bramlett dedicates the album to "My mom who sang alto."

Bonnie Bramlett wrote "If this album can make one person feel half of what I felt on this session, then I am happy.

Guest musicians on the album include Leon Russell, Joe Cocker, Duane Allman, Dave Mason, John Hartford, Ben Benay, Clarence White, Gram Parsons and Bobby Whitlock.

(Original pressings of The Rolling Stones' 1969 album Let It Bleed credit Johnson's song "Love in Vain" in similar manner).