Divide one bottle of the ginger ale between two half-gallon pitchers. Reserve remaining ginger ale for serving time. Add 1/2 cup of the berries, half the lemon slices, half the lime slices and 1 tablespoon of the ginger to each jar. Cover and refrigerate for 2 to 24 hours. (If chilling more than 2 hours, add the lemon and lime slices only 1 to 2 hours before serving. Citrus adds a slightly bitter flavor after 2 hours.)
Just before serving, fill pitchers with ice. To serve, fill each glass half full with the blueberry mixture and ice; fill glass with reserved chilled ginger ale for fizz. Makes 12 servings.