Bar manager Aaron Polsky hosts Winston and David at Harvard and Stone to discuss shrubs, a beverage made from fruit juice and vinegar. Centuries ago, shrubs were used to preserve fruit juices but with the advent of refrigeration, they fell out of fashion until a recent cocktail renaissance, but Aaron wants no part of it. For the tasting, homemade strawberry balsamic and orange champagne vinegar shrubs are served in addition to switchel.