My mom really like these and Mother knows best.
2 -3 oz. gin
1 1/2 oz. lemon juice
1/2 oz. sugar syrup or to taste
Maraschino cherry optional
Mix all ingredients except the club soda and cherry in a tall glass filled with ice. Fill with club soda and stir. Garnish with cherry, orange, lemon or lime if you like. Enjoy!