C ount Camillo Negroni, a member of Florence’s cultural elite, was known for being adventurous, eccentric and charming. In 1919 the Count asked the bartender at Caffأ¨ Casoni to strengthen his favourite cocktail — the Americano. The bartender opted to use English Gin so that the cocktail (made from Campari and sweet vermouth) would not lose its “beautiful red colour”, and garnished it with orange, instead of lemon, to distinguish it from its…