The Love Shack on 14th Street between Guerrero and dolores is my favorite club in San Francisco. the price is right and so is the variety. not to mention they are super nice and have an anniversary party that is usually really fun (think 10ft vapor bags).
You have to get a sticker and then you will get in but its only to keep the lines short. Its really sweet and if you live in the city it no problem to go and find out when they are adding new members.