What's nice about Buffalo Bill's is it's casual but semi classy. Unlike some other brew pub full of guys jotting notes or just frat guys pounding beer - Buffalo Bill's food offers enough for even people who don't drink beer and again, unlike some other places - they don't mind if you don't drink beer with your meal. The menu is not extensive but it's pretty solid - burgers, pizza, salad, pasta & sandwiches - good sized portions - not the cheapest deal in town but pretty good. The beer is always fresh and you get a lot of choices. You can even see the brew tanks there and if the brewing guy is there, you can go check it out and ask him questions. Again, not very snobby place and even fine for kids - definitely not a bar atmosphere but just a nice pleasant place for a meal (also lots of TV's). There is even outdoor seating now.
Pros: Probably Nicest in That Area of Hayward, Good portions, great beer
Cons: Parking Out back but no back door - have to walk to the front.