For many years I attended the Mt. Airy Fiddler's Convention (in Mt. Airy NC). Although there is a stage where one can compete for prizes (best band, best fiddler, best banjo player, etc., etc.) the real reason I attend is to visit with friends and play music. There are hundreds of jam sessions going on all over the park.
On Saturday night (really, early Sunday morning) after all the music competition is over there is a dance (clogging) competition. Most people who enter really can dance. Some who enter intend to be humorous.
One year I entered the dance competition wearing a Barney the Dinosaur costume.