If you’re the oddball grub representative among your group of friends, there’s a cool Meetup group that has regular outings to dives. (Meetup is a place where people with common interests can find others in the same locale and, shocker, meet up!)
It’s called the SF Dives group (make sure you read the About Us fine print!), and there’s a very active contingent. Grubgirl herself (that’s me) is a bit anxious about getting dropped from this list due to conflicts that have occurred on Wednesday nights but hopefully the organizer is a forgiving type.