One theory on the origin of the Gibson has Charles Dana Gibson responsible for the creation of the Gibson, when he supposedly asked Charley Connolly, the bartender of the Players Club in New York City, to improve upon the martini's recipe, so Connolly simply substituted an onion for the olive and named the drink after the patron. Another story given by Charles McCabe of the San Francisco Chronicle states it is from San Francisco. A.P. Gibson remembered that when he was a boy, his great-uncle, prominent San Francisco businessman Walter D. K. Gibson (1864–1938), was said to have created it at the Bohemian Club in the 1890s. Whatever the origin the drink remains a classic twist on the martini. Simple and clean usually served with a single onion it remains a standard.
In a shaker combine gin and vermouth, shake well and strain into a petite chilled cocktail glass. Add cocktail onion.