Rachel Ratner, a longtime multi-instrument rocker, was telling friends about her collaborations with a handful of Seattle bands over the years. The explanation eventually merited diagramming on a pad of paper. She detailed how bands related to one another, what members they had in common, what shows they’d played together. When she finished she’d produced a spaghetti-like flowchart, replete with countless snaking lines and about 30 circles of names.

http://www.wired.com/underwire/2011/03/seattle-band-map/