Think of it as a rite of passage. Most guys will simply pour whatever they have gathering frost in the freezer, but a gentleman mixes legitimate cocktails from his bar. This doesn't require a fancy piece of furniture (a simple tray will suffice) or even an immense amount of bottles. Build your bar by starting with the base spirits. Add your favorite mixers and you'll churn out a surprising number of classic cocktails and create a few new concoctions of your own. Herewith, the five bottles every man should have on hand.