Stag Night of the Dead (2010)

Amidst a nationwide plague, Dean presses on with his ill-fated wedding set for the next morning. He faces a dilemma: follow the demands of his controlling fiancée, Elaine, for wedding preparations or join his five friends and a stripper for a wild game of "Zomball" at a secret military site where they can blast zombies with massive stun guns. Ignoring the unwritten rule of never humiliating a zombie, the group soon finds themselves outmatched and hunted by the undead. As chaos ensues, Dean realizes that dealing with his future mother-in-law is now the least of his concerns.