Add this to your list of romantic hideaways — Chez Zou is an elegant, softly lit cocktail lounge, complete with potted palms and velvet-covered armchairs, three floors up from its parent, the buzzy Manhattan West Mediterranean place Zou Zou’s. Best yet: bar director Joey Smith (The NoMad) serves up vividly flavored cocktails to match the bar bites from Zou Zou’s chef Madeline Sperling.