A musical about two old cat ladies bitching at each other endlessly in annoying accents? Doesn't sound like a great idea. Even if you toss in the facts that it's based on a true story, the two eccentric recluses were related to Jackie O, and one dated Joe Kennedy, Jr. But Stages' production of Grey Gardens was the marvel of the season, and audiences couldn't get enough of it. Nancy Johnston and Susan O. Koozin nailed their roles, and director Kenn McLaughlin somehow made you forget just how claustrophobic the area he had to work with was. Stages extended the production's run, added as many shows as it could, and still attracted sellout crowds.