In a prime location off Regent Street, Gaucho Piccadilly is an upmarket Argentinian steakhouse housed in the old wine cellars of the Mexican ambassador. The vaulted restaurant is decked out in cowhide, a knowing nod to the chunky menu full of cuts of luxury steak, including the tender Bife de Lomo, aged for six to eight weeks and then flown in from Buenos Aires. Large selection of Argentine wines, bar and late-night supper lounge.