Designer Zoe Feldman used a floral wallpaper with soothing sage flooring covering to add curiosity and elegance on this Washington, D.C. Designer Michael S. Smith took his type to new heights—literally—by covering this Beverly Hills bedroom’s partitions and ceiling in a whimsical cloth by Cowtan & Tout. While this idea will not be for design wallflowers, it’s poised to make a significant assertion. Designer Martyn Lawrence Bullard is not afraid of color—and you should not be either! A seafoam green four-poster bed pairs perfectly with a brilliant blue comforter and patterned wallpaper. Old houses come with every kind of lovable…