Finn Mac Cool's is a neighborhood bar you can count on to have a low-key, comfortable vibe no matter when you arrive. Well, unless it's after a DC United game, when the fans descend on the bar to celebrate (or drink their sorrows away). Shuffleboard on the upper floor is a popular draw, as are the 24 different beers on tap. Flat-screen TVs show all the games, and the menu offers plenty of...