Following a series of sold-out New York concerts, Patti Smith showed she’s still got the rocker attitude. At the opening of her “Objects of Life” exhibition with photographer Steven Sebring at the Robert Miller Gallery the other night, Smith was not impressed when a pub licist offered to introduce her to other guests. A witness re lates, “Patti snarled that she’s been around since the ’70s and didn’t need someone to intro duce her to people.” She then mingled with the likes of Mi chael Stipe, Terry Richardson, Calvin Klein, Zac Posen and filmmaker Jonas Mekas.