3 c. sugar
2 c. water
1 c. lemon peel strips (about 6 lemons)
3 c. lemon juice
1 liter club soda, chilled

Cook and stir sugar and water until sugar is dissolved. Stir in lemon strips; bring to a boil. Reduce heat and simmer, uncovered, for 5 minutes. Remove from heat. Cool slightly. Stir in lemon juice. Cover and refrigerate until chilled. Discard lemon strips. Put in a pitcher and gradually stir in club soda.