Bedroom Adler's Slate grass cloth, a material he likes because it feels natural, sheathes a guest room's walls. Ravello and Nixon side tables flank the bed, which is covered with Adler's Alexander duvet. A reissued mirror by renowned metal artist C. Jere rounds out the eclectic room.  127+ Inspiring Interior Ideas from Jonathan Adler and Simon Doonan Go Trippy Contemporary on Shelter Island