Step 1

In a small saucepan, combine sugar and juice; bring to a boil over high, stirring until sugar has dissolved. Reduce to a simmer; cook, without stirring, until mixture is syrupy, about 2 minutes. (To store, refrigerate syrup up to 1 week; adjust consistency with water, if necessary.)

Step 2

To serve: Fill 8 glasses with ice. Pour 2 tablespoons syrup in each glass, and top with club soda. Garnish with cherries, if desired.