The weekend’s best in nightlife, music and art.

Howard University's Bisons are among the teams taking the field at Saturday's Nation's Football Classic at RFK Stadium.  (Photo by Tracy A. Woodward/The Washington Post)

Friday-Saturday: Beer at a baseball stadium usually means foamy, room-temperature domestic drafts. Not so during the DC Beer Festival at Nationals Park, which brings in more than 50 breweries for unlimited tastings, with food sold separately. There's plenty of local representation, including Devils Backbone, Port City, DC Brau, Flying Dog and Mad Fox, along with other tasty offerings from Narragansett, Aviator, Duck-Rabbit and Mother Earth. Tickets are $40.

Friday: 14th Street's popular hangout El Centro D.F. is expanding to a second, even bigger location in Georgetown, with the same glorious rooftop, but a few new bells and whistles, such as mezcal-based popsicles. The Georgetown El Centro opens at 1218 Wisconsin Ave. NW on Friday.

Saturday:  Complaints about the dilapidated state of the venue aside, there's something magical about watching football at RFK Stadium for anyone who lived through the glory days of Washington football; it's something of a delicacy. RFK hosts the Nation's Football Classic as Howard University faces Morehouse College at 3:30 p.m. A fan festival outside the stadium, featuring performances by Raheem DeVaughn, Experience Unlimited and Mambo Sauce, begins at 11 a.m.

Saturday: Rosslyn's Gateway Park sees one of the last outdoor concerts of the season, the Rosslyn Jazz Festival, which this year brings out a slate of stars, including Latin maestro Pancho Sanchez, who's joined by his Latin Band for a headlining set. The free festival kicks off at 1 p.m. and ends just before dusk.

Saturday: Jazz heads will have plenty to snap their fingers to this weekend. Jazz will also ring out in the Maryland 'burbs, as Silver Spring celebrates its annual Silver Spring Jazz Festival -- with headliner Branford Marsalis -- from 4:30 to 10 p.m. at Fenton Street and Ellsworth Drive.

Sunday: One of Washington's largest neighborhood festivals, Adams Morgan Day, hits Adams Morgan from noon to 7 p.m. Expect six stages of entertainment and 60 performances, along with dozens of food and craft vendors and specials at local businesses. For art hunters, vendors selling fine art, jewelry, crafts and photography will take over Belmont Street between Columbia Road and 18th Street.

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