Penn Quarter Porter is DC Brau’s second beer, following the success of the Public Ale (above). (Fritz Hahn/The Post)

Next up from DC Brau: Penn Quarter Porter, which makes its debut at a limited number of taps tonight. “It’s a robust porter,” explains DC Brau co-founder Brandon Skall. “The way that the Public was on the line between a pale ale and an IPA, this is on the line between a porter and a stout,” with chocolate notes and a dry, roasted finish.

If that description piques your interest, you’ll probably want to leave work early today, as Skall says there are only 27 kegs of Penn Quarter Porter in the entire city. (He didn’t have the full list of bars that would carry the beer when we spoke on Monday afternoon, but says that Meridian Pint, ChurchKey and R.F.D. should all receive at least one keg, and he also suggests looking in bars near the Verizon Center. “All of our limited edition beers will be named for some part of town, and we’re always going to try to get it to places in that neighborhood,” he says.

Update: Besides the three bars already mentioned, Penn Quarter Porter will be on tap at the Argonaut, Brasserie Beck, the Big Hunt, Capitol Lounge, Iron Horse Tap Room, Little Miss Whiskey’s, the Passenger, Pizzeria Paradiso in Georgetown and Dupont Circle, the Pug and Smith Commons.