Huh didn't know Dubliner was that popular. That's one of the alumni bars I go to for Notre Dame sports.
DC is really mostly museums, bars/restaurants, the monuments, and seeing the tidal basin. So if you're not much of a foodie or nerd, you're gonna have to venture outside the downtown area. For bar stuff in DC, you can walk (from Foggy Bottom) or uber over to Georgetown which is expensive but has some cool stuff like Pinstripe where you walk in and the ground level is a bar and restaurant, and the lower level is a bowling alley....and bar. Other hipster crap in that area too like a couple of piano bars. Dupont Circle has a large LGBT population and they have drag brunches on weekends which I still want to go to at least once.