Charles Gatewood's viewfinder is a window to the American underground, both cultural and sexual. Throughout his 40-year career, he's captured iconic shots of the Beats, portrayed Wall Street as a ghost town of lines, angles, and lost souls, and pulled sexual fetishism out of behind-closed-door obscurity. In conjunction with the release of A Complete Unknown, Gatewood's limited edition book of Bob Dylan photos, the Robert Tat Gallery will host "Celebrity!", an exhibition of some of the photographer's rarer snapshots of celebrities from the 60s and 70s, opening September 3. Famous faces in the exhibit include Al Green, Ginsberg, Dylan, Burroughs, Abbie Hoffman, and Rod Stewart (in a time when he was actually pretty cool).