Blend the peaches. pineapple juice and lemonade concentrate. Pour the mixture into four (14-ounce) glasses and fill the glasses with ice. Top with club soda (about one-quarter cup per glass). Makes 4 servings.
To peel peaches, score a small x in the bottom of each peach. Carefully drop peaches into a pot of boiling water. Boil for 20 to 30 seconds. Plunge the peaches into a bowl of ice water to shock them and let set for a few seconds. Remove from ice water and pull skin away from peach, beginning at the x at the bottom.