Interior designers reveal their secrets for making a den more inviting (plus: what do with the tons of books that tend to pile up in there).
By Abbe Wright
Courtesy The Cosmopolitan of Las Vegas
3 of 5
"Use a tromp l'oeil wallpaper: Architect David Rockwell applied a custom paper to the walls and ceilings of a private dining room in a Las Vegas restaurant to produce an intimate, clubby effect." — Linda O'Keeffe, author of Stripes: Design Between the Lines (The Monacelli Press)