This gem of a BYOB is a welcome find in Pittsburgh. From what I gather, the menu changes often and erratically so my review may not actually help you pick what to order. That being said, I've already started writing so here goes.
They did a squid ink dish with fish that really blew me out of the water. Also, the fish and chips is very, very good. The fall spice pork belly lettuce wraps didn't really impress me, but the other items more than made up for it.
Instead of dessert, I supplemented my meal by ordering a "raw bar" dish. It consisted of a few different creative takes on sushi (a fish salad, a few basic nigiris, and a "deconstructed" maki roll). This was pricey but extremely clever.
Avenue B seems oddly out of place, stationed in some random road in the 'burbs of Friendship. I applaud restaurant owners for striking out like this, bringing creative food to quiet areas that otherwise might be restricted to chain sandwich restaurants.