Divide the mint, sugar, and lime wedges among 4 old-fashioned glasses. Using a pestle (from a mortar and pestle) or the end of a wooden spoon, mash the mint, sugar, and lime together. Add some ice and top off with some pineapple juice concentrate, white rum, and club soda. Swirl with a sugar cane stick and serve.
Recipe courtesy of Ingrid Hoffmann