Hennessys is located at 25 Union St, Boston, MA. This business specializes in Restaurants and has 8 review(s) with a star rating of 3.0. Hennessys is open Mon, 11am-2pm; Tue, 11am-2pm; Wed, 11am-2pm; Thu, 11am-2pm; Fri, 11am-2pm; Sat, 11am-2pm; Sun, 11am-2pm and accepts American Express, Discover, Mastercard and Visa.