I'd guess that half the apartments in SF are in old wooden houses, with wood doors.
Wearing is, as well, but it's waiting on another SCOTUS decision for affirmation.
As for carrying in SF, only people named Feinstein are permitted to do that.
There are a handful of cases which ought to end the question on carry in the next year, as well. Either Williams or Masciandaro may do so this year providing SCOTUS grants cert.