For "young" (aka anyone who feels OK in a crowd where most people look under 30) symphony goers, the Symphonix league is having a rare event Tuesday night Oct. 2nd at Harlot - "An Evening with Michael Tilson Thomas" from 6-8pm. You have to be a member to attend, but membership is a great deal if you are at all interested in the San Francisco performing arts scene. MTT, for those who don't know, is the San Francisco Symphony's Music Director and a world renowned conductor.
As a former season ticket holder and multi-gala attendee, I've enjoyed being a member of Symphonix for several years now. While their events tend toward young professionals, I've been told that almost half of the members are married and many have children, so if that's you, don't feel put-off by the crowd. Symphonix hosts an annual Scavenger Hunt along with pre-gala events and parties. It's a great organization and this should be an interesting event.
Memberships ($75 for one person; $120 per couple) are available online and will be sold at the door. Symphonix will be providing complimentary wine, vodka drinks and hors d'oeurves. Side note: Harlot and Slide seem to be preferred venues for events like this lately, so check them out.