Seminal rock photographer Bob Gruen was in the audience at the Cutting Room last week to see New York Dolls lead singer David Johansen dust off his lounge-lizard alter ego Buster Poindexter for the first time in 15 years. The “Hot, Hot, Hot” singer has reemerged at Chris Noth’s own relaunched Cutting Room to play every Tuesday till May 7. A spy said the debut was a mix of “drinking songs, hokum blues, off-beat love songs” with titles including, “Stay As Sick As You Are,” “Somebody Buy Me a Drink” and our fave, “If You’re So Smart, How Come You Ain’t Rich?”