The chicly eccentric rooms outfitted by Nicky Haslam—a writer, singer, and bon vivant as well as a decorator—are as life-affirming as the man himself. Design Philosophy: “Appropriate, embracing, harmonious, rare, erudite, well made, and, above all, practical.” VIP Clients: Mick Jagger, the Saatchi brothers, philanthropist Dame Janet de Botton. Inspired By: “The 18th-century gentleman architects Thomas Archer and Sir Robert Taylor. Also, my architect uncle Robert Haslam, who pointed me toward the arts.” London; nh-designo.uk