The Pegu Club is a gin-made cocktail that was the signature beverage of Burma's Pegu Club. The club was called after the Pegu, a Burmese river. The first occurrence of the cocktail was in Harry of Ciro's book ABC of Mixing Cocktails from the 1920s.
As the composition goes, the drink it's a Gin Sour but without the egg whites and with the addition of bitters.
Add the ingredients into a shaker with ice and shake until well-chilled.
Double-strain into a chilled cocktail glass.