Drinking brewskies out back in the Airstream trailer is as classic an American pastime as baseball. But drop the RV inside a restaurant in the heart of Chelsea and what you have is something altogether new: metadining. Also: Redwood Kitchenette and Bar. It's a funky little joint with turquoise banquettes, wooden floors, and white tableclothes, where diners get a mash-up of comfort food and...