The San Francisco Ghost Hunt, run by Jim Fassbinder, is an enjoyable three hours of spooky fun and a great easy walk through lower Pacific Heights.
Jim is an engaging and talented storyteller with an outstanding sense of timing. The stories are just scary enough to cause pleasant shivers, but not so scary that you'll be freaked out to cross the hall to the bathroom at night. You'll also get a nice dose of San Francisco history that you won't get from guidebooks or 4th grade social studies.
You can get more information about the San Francisco Ghost Hunt at www.sfghosthunt.com