The Gastro Mixology menu (prices range from £5 to £9, londoncocktailclub.co.uk) includes an Oyster Bomb, a Squid Ink Sour, a Cheese and Pineapple Gele and even an Egg and Bacon Coupet, a surprisingly popular item - "it's accidentally become our signature drink" - made from bourbon infused with smoked bacon, mixed with egg whites, lemon and sugar and served in a martini glass with a pancetta crisp.