Favorite theme restaurant?

I am looking for a list of theme restaurants online but cant really find one-so i'm asking what theme restaurants people have visited? My favorite is probably the Rainforest Cafe, but there are a TON at disneyworld in FL that are great too: fifeties primetime cafe, scifi drive-in, the sea, the land, beaches and cream. I also like a more local restaurant that is called Nifty-fifties and is located near Philly, pa. I'll l'll look favorably on people that can come up with suggestions close to or in eastern PA.