The Haight-Ashbury Highball is a refreshing cocktail that pays tribute to San Francisco's iconic Haight-Ashbury neighborhood. It is made with gin, elderflower liqueur, lime juice, simple syrup, and a splash of soda water. The Haight-Ashbury Highball is a light and bubbly drink with a floral and citrusy flavor. It is often garnished with a lime wedge and served over ice.