(FORTUNE Magazine) – Since alcohol is a depressant, current thinking in the booze world seems to be "Add caffeine!" After all, the longer people stay awake, the more they'll drink. With Red Bull and vodka still a hit with celebs and club kids, and mixed drinks gaining market share against beer, Anheuser-Busch last month launched B (pronounced "B to the E," it means Budweiser Extra), beer dosed with caffeine, ginseng, and guarana. Reps insist it's not an energy drink like Red Bull or Sparks, another pumped-up malt beverage. FORTUNE took one for the team and conducted an unscientific taste test. -- Kate Bonamici