One of the essay questions on my Copyright exam asked whether Bikram yoga could be copyrighted. As a matter of fact, it already is - my professor won the case.
I saw this post on TechDirt about an ad company attempting to patent the moves by street-corner sign-spinners in Los Angeles. (If you've seen it, you know what I'm talking about. I'll try and find a link.)
I don't know why they would patent it - maybe the article is wrong - when it seems to me they'd have a good chance of copyrighting it. An original sequence of fixed, unprotectable moves in the public domain (AKA "facts") can be copyrighted as a "selection and arrangement."
UPDATE: Check out this poster's comment on the work-for-hire problems that a sign-spinner would face if s/he went to a different company!