It is brewed and canned in Washington DC by the DC Brau Brewing company LLC.
It is made using barley, oats, hops yeast and water.
It has an alcohol level by vol of 5.5%, so is a medium strength porter.
How does it taste? Absolutely delicious! Yes, it's a very decent porter which is robust and very well-rounded. It leaves a very pleasant aftertaste.
Penn Quarter is a part of Washington DC famed for being the home of Ford's Theatre, where President Abraham Lincoln was assassinated.
Where did I find this delicious porter? In my local Home Bargains branch! Home Bargains happens to stock an interesting range of bottled and canned beers and ales. Even more than some wine and spirit merchants.
It cost £1.49, I recall.