Last week, we gave you some suggestions for Halloween activities and events for children and families to enjoy around San Francisco. Today, we've got ideas for more grown-up fun around town, from haunted houses to spooky science to costume parties and more.

What did we miss? To add an event to our calendar, you can submit it here for free. And for more to do around the city, check out our full events calendar at hoodline.com/events.