Ballad of Bilbo Baggins

Unlike Bex, I never know which internet videos are "fresh" and which have already made the rounds. Since the following hilarious clip was posted a couple of years ago it's very possible that you've already seen it:



The song was actually recorded by Leonard Nimoy on his 1968 release The Two Sides of Leonard Nimoy. The video was originally aired in 1967 on the variety show Malibu U. My questions: was the dance completely ad-libbed, or did a professional choreographer actually tell them to move like that? Were the girls supposed to be hobbits, or are they Bilbo's dwarf companions? Why do their buttons say "Hobbits Unite"? What does that even mean? And where I can get one of those awesome sweatshirts?