Gin Tonic, or Gin and Tonic, is a popular cocktail in downtown Madrid. It is made by mixing gin with tonic water and garnishing it with a slice of lime or lemon. Gin Tonic is a classic and sophisticated drink that is enjoyed by many locals and tourists alike. There are also variations of Gin Tonic available, such as adding different botanicals or flavored tonics, to create unique and personalized combinations.