Halve four limes and squeeze the juice into a pitcher. (If desired, cut the squeezed limes into small pieces and add to the pitcher.) Mix in 3 tbsp sugar. Add 1 liter club soda, 1 cup berry-flavored vodka, 1 cup blueberries and 1 cup raspberries. Pour over ice. Serves 8.
[ via Real Simple magazine, June 2008 ]