Article & Photos by Jacqueline Bennett newsandviewsjb.com   Listening near the tavern bar one cold December day, tales could be heard of the ratskeller below.    “The Lion’s Den” in Stockbridge, Massachusetts is listed as one of New England’s coziest winter bars in an article  from “Yankee Magazine.” Located beneath the Red Lion Inn,  “The Den”, as it has been dubbed, can be reached through an exterior entrance and one inside the inn’s Widow Bingham’s Tavern.   During a luncheon at Widow Bingham’s Tavern, I overheard some staff express perplexity when a server described “The Den” as a ratskeller, sometimes spelled rathskeller. It is a term at the same time intriguing and off-putting. Any word that contains “rat” is cause for apprehension.   The…