"D House" is used to describe Denny's fine dining. Specifically the Denny's in Ballard, Seattle. Due to recent zone restructuring, the Ballard "D House" has closed and has now moved location to the Shoreline Denny's.
"Wanna go to D House?"
"Yeah I could use a Double Cheeseburger with Bacon and Seasoned Fries with a Fizzy Navel."