Place a small pile of sugar on a plate. Take a martini glass and either with a lemon half or water, wet the rim. Dip the rim of the glass in the sugar, getting a nice coating around the rim.
Into a cocktail shaker, add ice cubes, simple syrup, and lemon juice. Shake together for 15 seconds.
Strain the mixture into the martini glass. Top with club soda.
Garnish with lemon peel or anything else you'd like! Enjoy.