Where to watch the NBA Finals

We have been visiting for over ten years and typically do not watch a minute of TV while there, but we are Knicks fans and will definitely be watching this Finals game tomorrow night. I was wondering if there are any good spots to watch - its just not something I ever really paid attention to when visiting previously. We are staying in Edgartown but we can go anywhere. I have 2 daughters who are not yet 21 so it has to be somewhere that will allow 2 non-drinkers. Nancys? If not we will just watch at home, but I thought it cant hurt to ask.