The Dewey Decimal System (hush now, you know it works, LC-pfft) has religion from 200-300, how much is that, that is very very much indeed.
But Dance has only 3 little places after a point. It doesn't even have its own point, but falls under these headings
792 Stage presentations
792.7 Variety shows and theatrical dancing
792.8 Ballet and modern dance
793 Indoor games and amusements
793.3 Social, folk, national dancing
So and how does this rate on the scale of world calamities, not high you may think, but then are you cataloguing dance resources, are you? No.
Still with searching for cataloguing resources on Dance I did come across the
Jacob's Pillow archives and photos of
Ted Shawn and his Men Dancers, oh dear, oh dear, oh dear, camp doesn't even begin to describe it.