I always use this holiday as an opportunity to teach my music students about Irish music and dance. Given that fairy lore abounds in Ireland, it's not surprising that the worlds of faerie and music overlap. Here are two different versions of King of the Fairies-the first is the basic fiddle tune, the second a metal version by Waylander.
There is also a dance called the Fairy Reel, but each time I found a version I wanted to share, embedding was disabled. So here's a link, or you could search for it on Youtube: http://www.youtube.com/watch?v=37X5bZE1eXE