Evil Keg (2007)

Marcus Colby's family brewery, Col-Brew Brewing, is knee deep in financial trouble when Beer Mistress Vivian develops a revolutionary zero calorie beer. Unfortunately her late night experiments reveals a slight side effect; any one who drinks it turns into a flesh eating freak. When Marcus finds out about the bad beer he immediately sends Vivian home. The sexy evil beer mistress decides to get even and uses her invention for evil and world domination. She seizes Marcus' brewery and cooks up enough libations to infect the entire town. It's up to Marcus to save the family business, the townspeople, the love of his life, his father and the world.