I always loved this area in Philadelphia. The Cassatt tea room is beautiful, and the servers here are very friendly. They managed to be formal, but not stuffy (something New York servers can't quite achieve). Their standard tea service (about $25) included lovely sandwiches of pate, egg salad, smoked salmon, melon and chicken salad that were very fresh. Their current scone was accompanied by lemon curd, clotted cream and strawberry preserves.
Desserts included a blueberry tartlet, profiterole, layered cake and this rather obscene-looking strawberry mousse confection: