School’s out for summer. But you can still learn something this weekend.

SEE
An Inconvenient Truth
What: Al Gore’s crusade against global warming. Pledge to go this weekend with friends and 5 percent of ticket sales will go to Alliance for Climate Protection.
Why: It’s getting hot in here.
When: Opens Fri.
Where: Pledge to see the film online at climatecrisis.net; see it at AMC Loews Georgetown, 3111 K St. NW, b/t 31st St. & Wisconsin Ave.

DO
Washington Folk Festival
What: Take a spin with Cajun, contra, square, samba, and flamenco dancing and bands like The All-New Genetically Altered Jug Band or Honky Tonk Confidential.
Why: It don’t mean a thing if it ain’t got that swing.
When: Sat., noon-11 p.m.; Sun., noon-6 p.m.
Where: Glen Echo Park, 7300 Macarthur Blvd., Glen Echo, Md.

Dupont-Kalorama Museum Walk
What: Free admission and special events at neighborhood galleries like the Fondo Del Sol, The Textile Museum, and the Woodrow Wilson House.
Why: Life should imitate art.
When: Sat., 10 a.m.-4 p.m.; Sun., 1-5 p.m.
Where: Various locations; see website for details.

EAT/DRINK
Tapas and Sangria at Taberna del Alabardero
What: Check out the newly renovated interior, half-price tapas (try octopus and peppers or jamon serrano and manchego), and $12 sangria pitchers.
Why: Hora feliz!
When: Thurs. & Fri., 3-7 p.m.
Where: 1776 I St. NW, b/t 17th & 18th Sts. (202-429-2200).

Duffy’s Happy Hour
What: The just-opened restaurant and bar is offering deals like $4 Guinness pints if you have tix to the 9:30 Club and $5.95 fish and chips just for being you.
Why: Irish eyes are smiling.
When: Thurs. & Fri., 4-7 p.m.
Where: 2106 Vermont Ave. NW, b/t V & W Sts. (202-265-3413).