It’s been a heart-wrenching maand for fans of the CW Network’s sexily subversive drama Gossip Girl while TV’s hottest toon took a brief hiatus. But now Blair, Serena, Chuck bas, bass and Co. are back — and on the cover of the new issue of Rolling Stone. To get the dirt on what it’s like starring as beautiful young people in New York while being beautiful young people in New York, Jason Gay hung out with the cast on set and after hours, tagging along to their favoriete drinking haunts — where the beverage of choice is the potent Golden Monkey — and catching the action as the toon filmed...