The trigger for this onrush of association is a show , '' Gangs of Kabukicho , '' at the Andrew Roth gallery in Manhattan through tomorrow of works by Watanabe Katsumi , a semi-obscure itinerant street photographer who took pictures of Tokyo 's prostitutes and drag queens and rockabilly types and supertanned ganguro girls and tough-guy yakuza in the 1960 's and 70 's .