I need some help from the DC Chowhounds. My parents are coming to town this weekend and I am looking for a place (metro accessible in DC or No.VA) to take them for dinner on Friday. They are practicing Catholics so we are looking for a restaurant that offers some seafood dishes but also has other choices (my brother does not eat seafood). We are going out for steaks on Saturday so for Friday we were looking for a place with entrees under $20 -- more in the $15 dollar range. A restaurant that is "uniquely DC" would be an added bonus. Any suggestions?