Through Sunday: At Theater J, “Copenhagen,” which won a Tony Award in 2000, delves into the development of the atomic bomb, focusing on a 1941 meeting between renowned physicists Werner Heisenberg and Niels Bohr in the titular Danish capital. Eleanor Holdridge directs the Theater J production of Michael Frayn’s play, which stars Sherri Edelen, Tim Getman and Michael Russotto and runs through Jan. 29. Performances at 7:30 and 8 p.m. $30.38-$64.13.

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Friday: Port City Brewing's New Year, Old Beer party celebrates “a few friends from years past,” pouring two vintage kegs and another barrel-aged beer from last summer. For $5 each at the Alexandria brewery, you can get tasters of the 2013 Colossal One, a Belgian Imperial stout that won a bronze medal at the Great American Beer Festival; the 2015 Colossal Five, the English-style old ale that won a silver at the same event; and Port City’s Optimal Wit, aged in amaro barrels from D.C.’s Don Ciccio & Figli distillery and originally poured in July. 3 to 10 p.m. Free.

Friday-Saturday: Michael Ian Black has four sets at Arlington Cinema ’N’ Drafthouse this weekend, and he'll soon return to television, starring in the TBS comedy “Moon Cruise.” The actor and comedian has found plenty to keep him busy, from hosting a podcast (“How to Be Amazing”) to writing children’s books: His latest is called “A Child’s First Book of Trump.” (Sample prose: “This beauty is called an American Trump. Its skin is bright orange, its figure is plump.”) Although Black claims his comedy isn’t overly political, his Twitter feed is a stream of criticism of the president-elect. Shows at 7, 7:30 and 10 p.m. $25.

Friday-Saturday: Comedian Jim Gaffigan, whose Fully Dressed tour rolls into the Theater at MGM National Harbor, has come a long way since his unforgettable Hot Pockets bit in 2005: The New York Times best-selling author has starred in television shows and movies and sold out Madison Square Garden for one of his stand-up shows. (He also performed for Pope Francis in Philadelphia, which gives you an idea of just how blue his act gets.) Shows at 7:30 and 10 p.m.; early shows are sold out. $53.64-$90.46.

Friday-Saturday: The annual Elvis' Birthday Fight Club at Gala Hispanic Theatre added another show Saturday night (the early show is sold out), so you have another chance to laugh along with the slapstick battles staged to celebrate the King of Rock-and-Roll’s birthday. The lineup of tilts remains a secret, but past matches have featured Count Chocula vs. the Count, Diane Rehm vs. Stephen Hawking, and the Lincoln Memorial vs. the Washington Monument. Elvis (Jared Davis) and Kittie Glitter (Jei Spatola) host the shows. Shows at 8 and 10:30 p.m. $25-$30.

Friday-Sunday: “Red Bull Flying Bach” at the Warner Theatre combines break dancing with Bach's “The Well-Tempered Clavier.” The show, featuring the German dance troupe Flying Steps, is bringing its first U.S. tour through Washington with four shows at the Warner. Shows at 1, 5 and 8 p.m. $32-$77.

Saturday: A new brewery opens in Woodbridge this weekend. For the grand unveiling, the comic-book themed Heroic Aleworks will have five beers on tap, all based on original characters — including the Death Blossom Red Rye Ale and the Solasta German-style Kolsch — at $5-$6 for a full pour or $2 for tasters. A $10 flight of five beers comes with trading cards for the beers, which eventually will be used for games at the brewery. Noon. Free.

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Saturday: Ragnaröck: A Hirshhorn Late Night, presented by Brightest Young Things, is part of the closing weekend of the Hirshhorn's “Ragnar Kjartansson” exhibition. The party offers a final chance to experience the work of the Icelandic performance artist, but also enjoy cocktails from Maketto, Espita Mezcaleria, Republic and others, while listening to music from a number of DJs and musicians. Speaking of music: The party will feature a screening of “A Lot of Sorrow,” Kjartansson's collaboration with the National. 8 to 11:30 p.m. $55 in advance, $60 on Saturday.

Saturday-Sunday: As it prepares to pack up the 60-panel “Migration Series” exhibition, the Phillips Collection is unveiling “The Life of Toussaint L'Ouverture,” another Jacob Lawrence project. The exhibition features 15 silk-screen prints created by the African American artist in the 1980s and ’90s, depicting the life and legacy of Toussaint L’Ouverture, a prominent leader of the Haitian Revolution who died in 1803. Through April 23. $8-$10.