Finding the Best Chicago Pizza in Chicago: Go to Pequod's.
Probably get downvoted for this, but as a longtime resident of Chicago who literally lives on the same block as Giordano's, why anyone would look for Chicago-style pizza anywhere, including Chicago, is beyond me. As good as San Francisco's baking culture is, surely there's NY-style (real! :)) pizza to be had?
There isn't. Also, you won't find a good bagel anywhere in the bay area. I spent most of last summer looking.