Martini Bar
Technically it’s called a 50/50 since it’s half gin and half vermouth. As you won’t be individually stirring these 'tinis, water is added to aid in the dilution you’d normally get from ice. That’s necessary to transform the mixture from pure alcohol to a tasty, drinkable beverage.
2½ cups gin
2½ cups dry vermouth
olive brine
olives
cocktail onions
lemon twists
Combine gin, vermouth, and 1 cup water in any vessel large enough to hold all 6 cups of liquid. Stir until well combined (alcohol and water have different densities, so you need this step for proper mixing). Chill until ready to serve.
Pour over a glass of ice (it doesn’t need to be a martini glass) and let guests garnish however they like. Olive brine and olives for dirty, cocktail onions for a Gibson vibe, and a lemon twist for, uh, a twist.
Makes 8 servings.