I'd like to see a 50's Diner-themed Dungeon.
From the release:
Game designer Peter Schweighofer recently released Schweig’s Themed Dungeon Generator through the Griffon Publishing Studio e-storefront at DriveThruRPG.com. This game aid provides a form and some basic instructions offering guidance in choosing die ranges for corridors and chambers, stocking potential traps and exceptional treasures, and preparing a menu of escalating encounters. Fill out the form in PDF and print to paper or PDF; or just print out the blank form and fill it out by hand. Once complete it’s ready for generating a room-by-room dungeon for on-the-fly group play or an unscripted solitaire delve.