Tihany’s latest interior-design project is the public spaces of Foster & Partners’ massive Skymark Tower building, so he visits Istanbul often. “You can drink late at night, eat kebabs at any hour, and just get lost in this fantastic city,” he says. Tihany frequents upscale Köşebaşi Nişantaşi (Bronz Sk. 5, Maçka; 90-212/230-3868; dinner for two $80) for kebabs and authentic southern Anatolian cuisine. Classic European dishes (beef fillet with pepper sauce; schnitzel) draw the social set to Park Şamdan (Harbiye Mh., Mim Kemal Öke Cad. 18/1 ; 90-212/225-0710; dinner for two $130), in the Reina district. Poseidon (Cevdet Paşa Cad. 58, Kücük Bebek; 90-212/287-9531; dinner for two $100), a seafood restaurant in Bebek, has a lively scene in summer, but the best time to eat there is winter, when bluefish are biting in the Bosporus. After dark, you’ll find Tihany at Anjelique (cocktails for two $40), a glam bar right on the Bosporus in Ortaköy that “reminds me of a beach club in Ibiza,” he says.