As femme fatale, cabaret siren, and icon of Camp, the Christopher Isherwood character Sally Bowles has become this century's darling of "divine decadence"--a measure of how much we are attracted by the fiction of the "shocking" British/American vamp in Weimar Berlin. Originally a character in a short story by Isherwood, published in 1939, "Sally" has appeared over the years in John Van Druten's stage play I Am a Camera, Henry Cornelius's film of...