'I want something that will pick me up and f*ck me up,' Kate Moss asked famed cocktail maestro Dick Bradsell in the early eighties. And thus, the espresso martini was born, as the mixologist only had a coffee maker and some vodka to hand. We headed to the Bluebird in Chelsea to get a mixology masterclass from the restaurant's top bartending team. The espresso martini is one of the venue's most popular cocktails. The head bartender, Egzon Kastrati, revealed that the bar uses more coffee than the main restaurant for making the heady libations. In a month, they roughly rustle up 3,000 espres...