Can you teach an old Sea Dog new tricks?

Tavern in the Square recently opened in Northborough at the site of the former Sea Dog Steak & Ale. This is the fourth eatery in this location in the past eight years. We are not quite sure what square it is on, but the small six-restaurant chain has a place in Cambridge’s Porter Square. The restaurant has what appears to be traditional pub food and a large selection of draft beer.