A "soaring", "modern" dining room lined with floor-to-ceiling windows and eggplant hues is the backdrop for "casual" Italian meals, including pizza, at this Crystal City eatery catering to "office" workers and "families"; a few say it's "unmemorable"' but most find it "solid" with decent service and middling tabs; P.S. the owners' American restaurant within a restaurant, Farrah Olivia, is...