"Wagyu Mafia started as a private, invitation-only supper club, then grabbed headlines when it spun off this gyu-katsu (breaded beef cutlet) outlet, featuring wagyu versions up to 20,000 yen ($200) for a chateaubriand steak sandwich. There are plenty of cheaper cuts too, down to the 1,000-yen menchi (minced beef) option. But for those splurging, it also offers Opus One by the glass." - Robbie Swinnerton