Dance Party

Save your cash: !!!, Major Lazer, and Little Dragon all play free shows this week. Photo: Jim Dyson/Getty Images, Ben Hider/Getty Images, Tim Mosenfelder/Getty Images

Wild Flag
Celebrate Brooklyn, Prospect Park Bandshell at Prospect Park; 8/3 at 6 p.m.; Prospect Park West at 9th St; 718-965-8951
A good time don’t cost a thing when this brute force—made up of members of Sleater-Kinney and Helium—plays an outdoor show with Ted Leo and Mission of Burma.

PS1 Warm Up
MoMA PS1; 8/4 at 3 p.m.; 22–25 Jackson Ave. at 46th Ave., Long Island City, Queens; 718-784-2084
Art and thumping tunes mingle at the museum’s weekly outdoor dance party, this year under the blue origami-like installation called Wendy. On stage this Saturday will be Jamie xx, Pearson Sound, Lemonade, Sinjin Hawke, Zora Jones, and the smooth R&B stylings of Miguel, who will play cuts off his upcoming Kaleidoscope Dream.

Mad Decent Block Party
Williamsburg Park; 8/5, noon–10 p.m.; 50 Kent Ave. at 12th St., Williamsburg, Brooklyn
Get crazy in Williamsburg when Diplo’s Mad Decent label throws its annual free shindig, this time with party-starters Major Lazer, Erol Alkan, Bonde Do Role, Lunice, Riff Raff, Mr Muthafuckin’ eXquire, and more. RSVP online at maddecentblockparty.com.

Little Dragon
Celebrate Brooklyn, Prospect Park Bandshell at Prospect Park; 8/10 at 6:30 p.m.; Prospect Park West at 9th St; 718-965-8951
The Swedish electronica darlings play a no-dinero-necessary Celebrate Brooklyn show before popping over to Glasslands to D.J. a late-night summer bash. With Frankie Rose.

Robert Glasper Experiment
Marcus Garvey Park ; 8/7 at 7 p.m. 120th St., at Madison Ave.; 212-360-2777
The Grammy-nominated pianist launched into the jazz stratosphere last winter with his soul-inflected hit LP, Black Radio. At this free Harlem show, he’ll showcase his blend of hip-hop textures, Herbie Hancock–influenced harmonies, and killer keyboard chops.

!!!
Damrosch Park at Lincoln Center for the Performing Arts; 8/9 at 7:30 p.m.; 62nd St. at Amsterdam Ave.; 212-875-5000
Uptown won’t know what hit it when the dance-punk party starters (their name’s pronounced “chk chk chk”) play an outdoor concert gratis. With Lenny Williams.

Joan Jett and the Blackhearts
Coney Island; 8/9 at 7:30; West 21st St. at Surf Ave., Coney Island, Brooklyn
Joan Jett doesn’t sell seashells by the seashore—she sells old-fashioned rock and roll. Or rather she gives it away, because it’s a free show. Part of the Thursday night Seaside Summer Series which also features Classic Rock Night on 8/2 and Gladys Knight and the Commodores on 8/16.

Dance Party