I am a Londoner but posting this as I am stumped for ideas. We have some American friends visiting soon who like to eat in unusual or interesting surroundings. They don't want (nor can they afford) high end dining. Can anyone suggest anything, preferably in Central London or Greenwich area? My initial thoughts were the Medieval Banquet and the Big Red Pizza bus in Deptford. Dans le Noir has been suggested but I think they want to eat in quirky places, rather than not seeing where they are!