Backdoor 43

Milan, Italy

The world's smallest cocktail bar: four square meters and four seats on the Navigli, opened 2015 by the Farmily group at the same address as sister bar Mag. Booked guests pre-fill a form choosing spirits, flavors, glassware and even the music before arriving; passersby get takeaway cocktails served through a window by a bartender in a Guy Fawkes mask.