From 2001 to 2006, peripatetic artist Fritz Haeg (of Edible Estates fame) hosted a series of gatherings known as Sundown Salon in his geodesic domed residence in the hills of Los Angeles. Haeg's own activities include radical gardening, housing design, curation, grassroots education and political activism; such pursuits dovetail nicely with his salons, at which participants did everything from knitting to dancing. Over the years dozens of artists...