Another cocktail for your mad Men viewing party? The Collins was most likely named after 19th-century bartender John Collins of London's Limmer's Hotel. The Tom Collins was originally made with Old Tom, a sweet style of gin that's extremely hard to find today.
Recipe: Limoncello Collins
16 ounces limoncello (lemon-flavored liqueur)
12 ounces gin
8 ounces fresh lemon juice
24 paper–thin lemon slices
16 ounces chilled club soda
8 mint sprigs
In a pitcher, combine the limoncello, gin and lemon juice. Cover and refrigerate until chilled, at least 2 hours. Press 3 thin lemon slices against the inside of each of 8 collins glasses. Add ice to the glasses. Stir the limoncello mixture and pour it into the glasses. Stir 2 ounces of club soda into each drink and garnish with a mint sprig.