While you’re waiting for your five-story Greek Revival mansion facing Gramercy Park to sell, why don’t you turn it into a designer showcase? But make it interesting by assigning every room a theme based on a Showtime show. There’s a Californication study and a Dexter-inspired dining room. And since everything is for sale, the Weeds plants are yours. Take a video tour of all 8,800 unattainable square feet and then save $25 million.