To the untrained palate, the martini may be just a cocktail; but to those in the know, it's a whole lot more. Javier de las Muelas knows this, which is why Dirty Martini in Barcelona – an ever-present in the World’s 50 Best Bars list – received worldwide acclaim. The arrival of a London outpost, at the Meliá White House Hotel in Fitzrovia, piqued our interest and tastebuds – its menu is based around the drink, and the bar team get inventive with the ‘Excentric’ menu, which features The Carnivore, built around pisco, with Szechuan pepper and passionfruit, served on a frozen flower with dry ice. Don’t try this at home, kids.