Rating pools in 3D

Dancers don't all compete against each other — they cluster into "pools" by region, age, division and circuit. These are the rating pools (Leiden communities on the co-competition graph, discovered per style). Here they are in 3D: each sphere is a pool, sized by how many dancers it holds; the lines are crossover bridges between pools. Pick a style and fly around — drag to orbit, scroll to zoom, right-drag to pan, hover a pool to see who's in it.