After reading my post on the Hula, B☯rg A. Chupacabras ♀ has suggested that people could make their own posts about their own traditional dances, which is a FANTASTIC idea! They will be more aware of the history, what's appropriate in terms of sacred dances that shouldn't be viewed by outsiders, there will be no chance of cultural appropriation on my part, etc.
(My background is Anglo-Scottish, so here's a picture of a Scottish Sword Dance.)
I might still do some posts on dances that are from cultures where we don't seem to have representation, but I really, really like this idea.
We're going to use the tag "Traditional Dances", so if anyone wants to contribute, you can give it that tag.