Trombone Shorty & Orleans Avenue bring the funk to Merriweather Post Pavilion's Summer Spirit Festival. (Pierre Albouy/Reuters)

Friday, Aug. 4

Annapolis Rotary Club Crab Feast at Navy-Marine Corps Memorial Stadium: The largest crab feast in the state of Maryland requires 350 bushels of crabs, 3,400 ears of corn, 150 pounds of barbecue and 100 gallons of crab soup, to say nothing of the rivers of beer and soda. It's so big that it requires the Naval Academy's football stadium to hold all 2,500 attendees. All proceeds from the Annapolis Rotary Club's 72nd annual all-you-can-eat-and-drink crab feast are donated to local charities. 5 to 8 p.m. $65 adults, $25 children aged 3 to 12.

'La La Land' in Concert at Wolf Trap: “La La Land” might not have won Best Picture, but it did take home Academy Awards for Best Original Score and Best Original Song. The National Symphony Orchestra, under the direction of Emil de Cou, will perform the music from the film under the stars at Wolf Trap while the audience watches the movie on huge high-definition screens. Get to the park early: At 7 p.m., de Cou will talk about the film and the score at a free preperformance discussion. 8:30 p.m. $40-$50.

Jerry Garcia birthday bash at Gypsy Sally's: The Georgetown club's annual tribute to the Grateful Dead's frontman features an all-Dead set by cover band Better Off Dead, who've become fixtures at these events, and Baltimore bluegrass group Dirty Grass Players, who will perform the 1975 self-titled debut by Old and in the Way — the bluegrass band featuring Jerry Garcia — in its entirety. 7 p.m. $15.

Saturday, Aug. 5

Taste of Studio at Studio Theatre: Studio Theatre's annual open house offers much for theater lovers — previews of the current production “Wig Out!," a symposium with playwright and director Aaron Posner, acting conservatory workshops for amateurs, even a flea market of former Studio props and costumes. But it's also a community arts festival, with art installations, performances by local choruses and gospel groups, and a beer garden and mini-food festival with samples from Haikan, Birch and Barley and other restaurants. Noon to 8 p.m. Free admission; food and drink purchases require tickets.

MidCity Dog Days Sidewalk Festival: Over 18 years, the Dog Days festival has expanded from a sidewalk sale along a few compact blocks of 14th Street NW to something much larger: Participants now stretch from N Street to Florida Avenue, and from Eighth to Seventeenth streets. Retail is still the heart of the day: Browse for discounts at dozens of stores (Lettie Gooch, Flowers on 14th, Som Records and Salt and Sundry) and stop for refreshments at Bar Pilar, Glen's Garden Market or Nellie's, which is extending happy hour all day. Hours vary; see the website for a map and list of participating businesses.

Saturday and Sunday, Aug. 5 and 6

BrickFair at the Dulles Expo Center: From movies to architectural models, Lego is bigger than ever. The company's popularity is on display at the BrickFair, which fills 130,000 square feet with everything Lego: a 25-foot-long model of the battleship USS Missouri; the giant Rube Goldberg-esque Great Ball Contraption; even a Lego mini-golf course. (And yes, there are plenty of vendors selling rare and original sets, figurines and accessories for Lego fans of all ages.) Saturday from 10 a.m. to 5 p.m.; Sunday from 10 a.m. to 4 p.m. $17 in advance (includes expedited entrance and special Lego tile). $15 at the door. Children aged 3 and younger free.

SAAM Arcade at Smithsonian American Art Museum: The Smithsonian American Art Museum’s annual festival is a celebration of arcade games. Relive old memories by playing classic pinball and arcade games, including Tron, Donkey Kong and Pac-Man, or try your hand at new and experimental games created by developers from around the world. Gaming competitions, design-your-own-game workshops and musicians performing tunes from popular games are featured both days. 11:30 a.m. to 7 p.m. both days. Free.

Summer Spirit Festival at Merriweather Post Pavilion: There’s something for everyone at Merriweather Post Pavilion this weekend: the throwback ’90s R&B of Kenny “Babyface” Edmonds and SWV. Old-school hip-hop by De La Soul and Common. Bell Biv Devoe’s new jack swing. The Internet’s contemporary soul. Trombone Shorty’s driving funk. E.U. and Sugar Bear’s unstoppable go-go. Wear comfortable dancing shoes. 2 p.m. both days. $54-$250 per day; $97-$450 for a weekend pass.

Sunday, Aug. 6

D.C. Craft Bartenders Guild Rickey Month Finals at Jack Rose: The District’s official “native cocktail” is the rickey, a 19th-century concoction that’s beautiful in flavor and simplicity: gin or bourbon, soda water and lime. Every July, bartenders across the city experiment with their own twists on the formula, crafting their own sodas, adding syrups and even using dry ice. The top eight rickeys in town, as selected by the D.C. Craft Bartenders Guild, go head-to-head before a panel of judges at Jack Rose this weekend, but the public is the real winner: Entry to the contest includes unlimited rickeys and passed sandwiches and snacks. 1 to 4 p.m. $30. 

13th anniversary party at Wonderland Ballroom: When the Wonderland Ballroom opened in 2004, Columbia Heights was a long way from cool. (Heck, the neighborhood was a long way from having a Target.) But Wonderland was definitely cool: The vintage signs, the fantastic jukebox, the dance floor that stayed packed until the wee hours. And through 13 years of Delirium Tremens beers, bacon brunches and offbeat musical and comedy performances, Wonderland has stayed true to its roots. Join the staff in the beer garden for an all-night happy hour (beginning at 4 p.m.), with live music and, most likely, plenty of shots. 4 p.m. to 2 a.m. Free admission.

Reggae JamFest at Seafarers Yacht Club: Jamaican-born reggae singer Monsoon and the S.T.O.R.M. headline this tribute to 55 years of Jamaica's independence, along with Ras Slick and Dutty Bus Crew. The party at the Seafarers Yacht Club along the Anacostia — one of America's oldest black yacht clubs — also features DJs Super Slice and Ablaze, and food and drinks catered by Baltimore's Island Quizine. 3 to 9 p.m. $25.

Made in Hong Kong Film Festival at the National Museum of American History: The final weekend of the Freer/Sackler Gallery's Hong Kong film festival looks at movies made after the island was transferred from Great Britain to China in 1997, and includes two certified classics: “Beast Cops,” with Anthony Wong playing a corrupt cop fighting gang violence, and “Made in Hong Kong,” about alienated teenagers mixed up with gangsters. (Due to ongoing gallery renovations, the films will be shown at the Warner Bros. Theatre at the National Museum of American History.) Times vary. Free.

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