This invigorating drink is for grownups who prefer tart to sweet. Unlike nutrition-empty sodas, this one has plenty of vitamin C. If you like, serve it in a salt-rimmed glass with a sprig of rosemary.
Combine first 3 ingredients in a 2-cup glass measure, stirring until sugar dissolves. Fill 2 glasses with ice. Pour juice mixture and club soda evenly over ice. Garnish with grapefruit wedges, if desired. Serve immediately.
Cooking Light Chill