Maria Muldaur had a big hit with Midnight At The Oasis. Her follow up album, Waitress In A Donut Shop, included her version of Sweetheart, a song written by Ken Burgan and first done by Dan Hicks And His Hot Licks. Maryann Price had the lead vocal in that version and Maria was inspired to add it to her second album.
The song features many jazz voicings of chords, pretty much changing every two beats. The lesson goes over a few different ways to play most of the chords, and a percussive, comping style common to old jazz tunes.