I will be making a first time visit to Boston, and staying near downtown and/or the convention center. I will not have a car. I am looking for the best local food Boston has to offer, that are can't miss places for a first time visit. I'm not looking for fine dining -- just the best in those areas for chowder, seafood, and other local favorites (old school, holes in the wall are fine, if not prefered).
Thanks for your thoughts, Boston!