First this guy who looks like a lost Hudson Brother but with worse teeth than Freddie Mercury plays keyboards. Also, Melvin from Accounting plays drums, in a buckskin vest. Dan Haggerty, television's "Grizzly Adams", is on bongos.
Then the Indian maidens appear out of teepees.
And then there's comical writhing.
Addendum: Apparently it's Tommy Seebach and the Seebach Band. See http://www.livejournal.com/users/substi