Ever heard of a Southside? I hadn't before ... but apparently, it was a popular American Jazz Age cocktail. A favorite of Al Capone and similar to a Gin Rickey, the Southside is a tangy mix of gin, lime and mint leaves. According to cocktail historians, Prohibition gin was less pure, so sweeter ingredients had to be added to make it palatable. Inspired Taste has the recipe and shares that it was invented in New York City at the 21 Club. After all these years, it still feels fresh.