Put all ingredients EXCEPT club soda in a 1 quart bottle

To serve, pour 4 oz of mixture in a glass. Add 2 oz soda. Add ice.

Pour over ice filled glass and top off with club soda. Garnish with grapefruit and or lime wedge.

Pour some kosher salt on a plate. Rub a slice of grapefruit or lime on the rim of a glass and dip rim of glass into the salt.