I would suggest the Walkin' Santa Dance.It is one of four exisisting dance haps available that I know of.
GT40 used it in HTML format with his jukebox skit and it was great. Different speeds and songs and characters.
With Hal interface, to adjust speed, maybe you could align a bar of .haps that have different timing for the dance.
What I mean by that is open hap folder and mouse drag the top, bottom or sides till it fits with Hal interface and jukebox areas. Or you could use Hap Windows OSI instead of just a player window or Hal so you can just click speed. I just tried that setup on my desktop,(sans dance) it looks pretty nice.