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WASHINGTON, DC - March 27th, 2012 - Derek E. Miller and Alexis Krauss of indie-rock duo Sleigh Bells perform at the 9:30 Club in Washington, D.C. The duo's second full length album, Reign of Terror, was released in February and debuted at number 12 on the Billboard Hot 200. (Photo by Kyle Gustafson/For The Washington Post)
Derek E. Miller and Alexis Krauss of indie-rock duo Sleigh Bells are part of the Mad Decent bill . (Photo by Kyle Gustafson for The Washington Post)

Friday:  For the second year, producer-DJ Diplo returns to Merriweather with a rat-pack of noisy, exhilaratingly rude boys and girls of electronic music. This summer's Mad Decent Block Party is gearing up to be even more compelling. Besides Diplo, whose own mixes are influenced by the sounds of Brazilian favelas, expect dubsteppers Flux Pavilion as well as Sleigh Bells, the duo of Derek Miller and Alexis Krauss, whose menacing, screeching pop is precisely the stuff that has kids cranking the volume. (With Dillon Francis, Trippy Turtle, Wave Racer and Wolfgang Gartner.) Tickets are $45-$75.

Saturday: It's last call for head-spinning rum drinks at Hogo, the Seventh Street NW tiki bar that lasted about as long as the nation's cocktail heads were crazy for all things tiki. Celebrate with the staff, and one last pineapple drink, through Saturday. Read more: Say mahalo to Hogo.

Saturday-Sunday: During Brickfair, the annual celebration of all things Lego at the Dulles Expo Center, brick masters show off what they can do with a little bit of imagination and a whole lot of small pieces. Kids can get into the action with interactive models, giveaways and a stay-and-play area. The event, set for 11 a.m. to 4 p.m. each day, costs $12 (ages 3 and younger are free).

Saturday: Take an ibuprofen, lace up your Docs, and prepare yourself for another go-round of the annual Mayhem Festival. The scream-a-thon pairs Korn and Trivium, plus local boys Darkest Hour and an act perhaps too vintage for some screamo fans to even remember: Body Count, the Ice-T-fronted band that made national headlines two decades ago for the rap-meets-metal track "Cop Killer."

Sunday: The Blackbyrds' "Rock Creek Park" is an anthem that summons every happy feeling that summer brings, whether you're a fan of classic soul, rare grooves or just love D.C. It's such an enduring song that soul music devotees make pilgrimages to Rock Creek Park to say they saw its namesake in person. With this storied history in mind, the park jam going down in Rock Creek Park this Sunday is shaping up to be a beautiful affair. The Grits & Gravy and Daylight DJs have been the preeminent crews curating parties of R&B dance classics in D.C. for years, and they're teaming up for this one with special guests DJ Eskimo and DJ Zulu. The jams kick off at Rock Creek Park's Picnic Grove 8 (Beach Drive, north of the golf course) at noon and go until dusk, rain or shine.

Sunday: Rickey Month is nearing its culmination: The annual Rickey Month Party at Jack Rose Saloon in Adams Morgan. It's a ritual that involves guests sampling tasty gin and bourbon treats from some of the city's best bartenders, who are vying to re-mix the city's native cocktail while maintaining the lime-scented, fizzy heart of the drink. While party-goers taste, judges are sampling the offerings too, and voting for their all-around favorite, which is announced at the end of the night. Admission is $35 at the door; the rickey sipping starts at 4 p.m.

Through Sept. 21: Cirque du Soleil has an enduring relationship with National Harbor, one that goes back to the days there wasn't much on the shores in Prince George's. Now, there's a Nando's, a few other restaurants, a giant Ferris wheel and "Amaluna," the latest Cirque show to take up under the bigtop at the waterfront faux-metropolis. "Amaluna" -- spoiler: shades of "The Tempest" here -- follows island queen Prospera, whose magic causes a shipwreck that in turn brings to the island an unwanted suitor for her daughter.