Works in Progress Inside five spring productions before opening night. Photo: Mark Seliger for New York Magazine Of course I asked André Gregory and Wallace Shawn to dinner. How could I not? Well, it ended up being more of a late lunch. Gregory is 91, Shawn 82, and while they’re both in good health, they’re not much for a night out or a noisy room. So we meet at Cookshop, near their apartments in Chelsea, at 3 p.m. My Early-Bird Special With André doesn’t have the same ring, but who cares? They’