Like most cities, San Francisco has its share of problems. Unreliable public transportation, a few corrupt city officials, and, of course, a scourge of the undead.

Thank goodness for the San Francisco Zombie Mob, which keeps readers notified of upcoming zombie activities. As a concerned citizen (or visitor), you'll want to keep an eye on the site so you can attend upcoming zombie attacks and fight them off. Or...you might just find yourself dressing in zombie gear for the event. Gasp! You were one of THEM all along!

Seriously, zombie battles. It's good times.

(Photo courtesy of the Laughing Squid site.)