Potrero has two bars in the restaurant.  The downstairs bar is the first thing you see when you enter the restaurant.  It has a mixed feel that is not quite a pub, but not quite a lounge or restaurant either.  Look for the large amount or regulars anchoring the left corner of the bar.  There is also a relatively open kitchen that you can see from the bar that adds a lot to the atmosphere.

The upstairs bar has much more of a "bar" feel.  It has five televisions and four pool tables (which are from South Beach Billiards).  Upstairs also leads to the huge rooftop sun deck that has amazing views.  Lots of sun and warmth in the day time make this the place to be in the summer to enjoy some great San Francisco beer.

The upstairs roof deck currently has a large canopy with walls to shield everyone from the winter elements.  Heaters keep the tent warm when it's cold outside.