Guitarist Luther Grosvenor later became a 'true pop star' when he joined Mott The Hoople and became Ariel Bender, about four years after this was filmed.
This clip contains brief footage of Spooky Tooth rehearsing at the Fillmore East, Luther playing acoustic guitar in a hotel room, Luther interacting with groupies and also groupies talking about Luther - and composing a poem about him.
We also see Luther asking the 'artist', Cynthia Plaster Caster, to make a cast of his penis.