To put it in comic book terms, at most restaurants, the wine list is usually Robin to the menu’s Batman. Not so at the Mission’s new B3 wine speakeasy, opening tomorrow. There, you’ll find 50-plus affordable domestic wines with teeny, tiny productions. (Ever heard of Forlorn Hope or Hesperian? Neither had we.) Any wine can be ordered as a one-and-a-half-ounce taste or by the glass or bottle. You can even buy bottles (or cases) at discounted prices to take home. For the best deals, snag a spot at the wine-barrel tables during either of the two happy hours (3 to 6 p.m. and after 10 p.m.), although there are plenty of glasses priced less than $10 on the regular menu. There is food, in the form of no-nonsense burgers, which get accompaniments like house-made pickles or hen of the woods mushrooms, and local sausages served on Acme rolls piped with mashed potatoes. A chicken-and-waffles brunch is in the works. Considering the chef worked at Ad Hoc, we’re guessing the fried chicken is going to be superheroic. B3, 1152 Valencia Street, between 22nd and 23rd Streets (415-401-7258). Photo: Thinkstock Well, aren’t you fancy? Get even fancier when you learn to decant a bottle of wine.