Stop, drop, and roll.

TRADE
Clothing Swap
What: Shop your own closet at the annual switcheroo. Buy a ticket, drop off one bag of your clean clothes, then refill with someone else’s discarded treasures.
Why: Tail the ladies with street style.
When: Sun. Drop-off, 1-2 p.m.; swap shop, 4 p.m.
Where: Nana, 3068 Mount Pleasant St. NW, b/t Hobart & Irving Sts. (202-667-6955). Tickets ($15) at eventbrite.com.

CHEERS
Sips
What: Foodie royalty José Andrés, Joan Nathan, and Alice Waters corral the city’s top talent to serve cocktails and dishes for D.C. Central Kitchen and Martha’s Table.
Why: Put your money where your mouth is.
When: Sat., 7 p.m.
Where: Newseum, 555 Pennsylvania Ave. NW, b/t 3rd & 6th Sts. (202-292-6100). Tickets ($95) at sipsandsuppers.org.

ENCOUNTER
Mingle at the Museum: Lalla Essaydi: Revisions
What: Indulge in Moroccan-inspired hors d’oeuvres and cocktails; get henna tattoos; and tour portraits of Arab, African, and Muslim women with curator Kinsey Katchka.
Why: These barrier-breaking photos are jaw-droppers.
When: Tonight, 6:30-9 p.m.
Where: National Museum of African Art, 950 Independence Ave. SW, b/t 9th St. & L’Enfant Promenade (202-633-4600). Tickets ($50) at smithsonianassociates.org.

SWING
NatsFest
What: The men and boys of the curly W host an active meet-and-greet with batting cages and plenty of photo ops.
Why: Someone’s got to look over the prospects.
When: Sat., noon-4 p.m.
Where: Walter E. Washington Convention Center, 801 Mount Vernon Pl. NW, b/t 7th & 9th Sts. (202-249-3000). Admission is $20.

HEAR
Chelsea Wolfe
What: Skip the Sunday night blues for an evening with a rising doom-folk artist. The black eyeliner apologist (supported by a full band) shows off her dark side.
Why: This California girl bums you out in the best way.
When: Sun., 8:30 p.m.
Where: Rock & Roll Hotel, 1353 H St. NE, b/t 13th & 14th Sts. (202-388-7625). Tickets ($12) at ticketalternative.com.

SWIG
Hawk ’n’ Dove
What: Hatch a plan to check out the Hill’s freshly reformed dive bar for classic happy hour brews (eighteen on tap), burgers, and new higher-brow fare like flatbreads from a wood-burning oven.
Why: Taxidermy, out; chandeliers, in.
When: Mon.-Thurs., 4-10 p.m.; Fri. & Sat., 11 a.m.-11 p.m.; Sun., 11 a.m.-10 p.m.
Where: 329 Pennsylvania Ave. SE, b/t 3rd & 4th Sts. (202-547-0012).

Photo: Courtesy of Nana