This category includes both non-profit organsizations and commercial dance schools that offer Swing dancing lessons, Boogie Woogie, Rock'n'Roll, Fusku, Lindy Hop, social Ballroom dancing (Finnish Tango, Valtz, Humppa, or the like), or competitive Ballroom dancing.
I''m not sure this division will work. With just a few English sites the categorization is hard to make. The same sites in the Finnish language cat will be easier with more material.