That is the NYC Hill Country Barbecue in the photo above. Below is a picture of the Washington D.C. Hill Country Barbecue exterior.
http://www.hillcountryny.com/home.php
And click on the link below to read a Washington Post article about this place.
http://www.washingtonpost.com/lifestyle/food/smoke-signals-hill-country-founder-aims-to-bring-the-taste-of-texas-barbecue-to-dc/2011/03/09/ABO08TZ_story.html
And below is a review of D.C.'s Hill Country Barbecue by the same guy who wrote the article above.
http://www.washingtonpost.com/blogs/all-we-can-eat/post/smoke-signals-scaling-hill-country/2011/03/14/ABc2wsW_blog.html