“The Wonderful World of Hobbies”—the title of Mans Wrange’s latest show—suggested a world of mild madness, obsessiveness, eccentricity, and dilettantism. As usual, Wrange’s installation was comprised of a number of short narratives. The characters this time around were four fictional hobbyists, each representing a particular type of “mania”: first, a systematic collector of used chewing gum, who has placed his findings—about 400 specimens—in handsome shallow vitrines of patined wood. From a distance, the gum looks like a collection of minerals, or of rubble. The hobbyist