1. Into a 1 quart Jar with tight fitting lid, put sugar and lemon peel, or zest; add 1 1/2 cups very hot water (not from tap!). With lid fitted firmly, shake jar until sugar is dissolved.
2. Add lemon juice. Refrigerate until chilled.
3. To Serve: Into each 12-ounce glass, over ice cubes, pour 1/4 cup of the lemon syrup.
4. Then add chilled club soda or, if you prefer, water.
5. Stir to mix well.