We are two veggies and an omnivore who will be staying in Harvard Square for a long weekend in December and are looking for recommendations that will suit us all. We pretty much know about the relatively decent-ish fast food places, but anything sit-down (of any nationality/price range) would be great to know about. We prefer quieter except if there is live music (jazz or blues are best). We are always willing to travel for somewhere special, though as we like a drink we would rather not have to drive as well. Thanks in advance.