By day a mild-mannered ethnomusicologist; when night falls whooping it up with the banjee queens at Shelter. Fikentscher goes deep with participant observation to give the social scientists their field guide to the ’90s New York underground: the DJ’s plumage, the calls of the different dance species, and the mating rituals of the lesser-spotted Garage-head. Best on the essential blackness, gayness and churchiness of it all.