L. and I had dinner last night at Franklin's Restaurant, Brewery, and General Store in Hyattsville, Maryland (close to where L. works). Like this review says, "Franklin's is a hoot," with a quirky menu, decor, and these novel but tasty beers they serve on Fridays. A "firkin" is a "small wooden barrel or covered vessel," so I assume these beers are specials the brewers create in small quantities and serve only on Fridays. Highly recommended if you're ever in Hyattsville.