The Fàbrica Moritz Restaurant is located inside the ancient Moritz factory in Barcelona. Is a place to have some tapas while enjoying a great beer (their own, daily brewed). It's a great price-quality option (20€).
Besides, it's located close to the center of Barcelona, so you have a perfect afternoon plan. Dinner at the Moritz Restaurant, walk through the Gotic Quarters and have a drink in one of the bars close of the Plaza Reail.
Fore more information and booking, visit: http://www.moritz.com/