The Clover Club is named after a turn-of-the-century social club that met at the Bellvue-Stratford Hotel in Philadelphia.

The Clover Club has a nice fizzy texture with a subtle taste of raspberry

The Dale Degroff recipe consists of Gin, lemon juice, raspberry syrup and egg white.
Some recipes (including that in the 1946 Old Mr. Boston) call for grenadine in place of raspberry syrup. According to Gary Regan in The Joy of Mixology, the early recipes specified raspberry syrup but over time grenadine became the norm; Regan says "use raspberry syrup if you have it at hand--without it this drink isn't much to talk about."

DDG offers another variation which involves shaking a sprig of mint with the other ingredients--we liked this version better.