I just tried a relatively new place tonight for the first time. Called Brasserie Beck at 11th & K Northwest. It is not a microbrewery, but it was sort of an odd beer focused restaurant.
The only way to describe it was that it was like one of the trendy wine bars except with beer. Food was fine and i am not a huge beer drinker so i probably didn't enjoy as much as others, but it was an interesting experience. They had a "beer menu" similar to a wine list that was a small 6 or 7 page book with different types of beer. Mostly seemed to be Belgian beer / French food.
The bar area seemed relatively active for around 7pm on a Wednesday.
They had just opened in April this year.