There were a string of "sour" Tiki Drinks throughout the years, including the Eastern Sour, London Sour and Munich Sour, but this 1950s Western Sour is as good a place to start as any.
Unlike the others mentioned above, the Western Sour is made with Falernum instead of Orgeat. While Orgeat has a distinctive almond extract-like flavor, Falernum has a more complex combination of spice, notably lime and clove.
It may also come as a surprise that this Tiki Drink is not made with rum, but instead bourbon - or in this case, whiskey.
A simple shake and it's ready to go.
Recipe adapted from Beachbum Berry Remixed: A Gallery of Tiki Drinks.
Combine ingredients in a cocktail shaker with ice and shake to chill. Pour unstrained into rocks glass and garnish with a cherry.