The DC Environmental Filmfest runs through next Sunday, so start filling up on green flicks this weekend. Friday night, check out the D.C. premiere of Mexican film To the Sea/Alamar at the Inter-American Development Cultural Center (1300 New York Ave. NW; 202/633-4640; iadb.org), about a father and son bonding after years apart. If you miss it, be sure to swing by the African Art Museum (950 Independence Ave., SW; 202/633-4600; Africa.si.edu) Saturday at 2 p.m. for a discussion and viewing of a documentary about Nobel Peace Prize-winner and founder of Grassroots Green Belt Movement Wangari Maathai in Taking Root: The Vision of Wangari Maathai. Details: Both events are free; call for reservations for Maathai film. For a complete list of the environmental films—155 total—go to dcenvironmentalfilmfest.org

Nostalgic we are. Sometimes, a catchy name is all it takes to become a hit. Catch one such phenomenon, better known as Average White Band, the Scottish funk and R&B band most known for its instrumental hit, “Pick Up The Pieces,” at The Birchmere (3701 Mt. Vernon Ave., Alexandria, Va.; 703/549-7500; birchmere.com) Friday night. We’d take advantage of the chance to flaunt your not-so-average dance moves. Details: Show begins at 7:30 p.m.; tickets, $35, available online with convenience fee.

If you need further proof the heady days of spring are upon us, venture to the S. Dillon Ripley Center (Photolab 3036, 1100 Jefferson Dr., SW; residentassociates.org) and sign up for the Spring Landscape Photography class on the Potomac. The orientation begins Friday morning and spans eight 3-hour sessions where amateur and beginner photographers will develop their own vision of the 15-mile stretch and be critiqued by a local professional. Details: Class is $200 for members, $246 for general admission. Check web site for more information.

Ever wish you were a part of the Renaissance? Now you can at least hear some 17th-century tunes during Ballets and Brawls at the Folger Elizabethan Theatre (201 E. Capitol St., SE; 202/544-7077; folger.edu), the springtime concert opening Friday evening. Need a bigger dose of le français? Bonnie Fairbanks and the Little Maids of History and Company will present a free 17th-century dance demonstration before the show—and yes, audience participation is the whole point. If you’re not ready to throw on your dancing shoes and lace up the petticoats quite yet, just show up for the music: The show starts at 8 p.m. Details: Tickets $35, available online or by phone.

It’s not even spring, yet people are singing about “Summertime” in Porgy and Bess, opening this weekend at The Kennedy Center (2700 F St. NW; 202/467-4600; kennedy-center.org). The familiar story follows a handicapped beggar and his somewhat ill-fated love for headstrong Bess. A mix of jazzy blues that blur with gospel chords, this opera, ending April 3, is one that can’t be missed. But hurry up—opening night is already sold out. Details: Tickets $50–$300, available online and by phone. Shows at 7 p.m. Mondays and Saturdays, 7:30 p.m. Tuesdays through Fridays, and 2 p.m. Sundays. Check web site for full schedule, as the opera only shows on certain days.

Sign up today for the National Walk for Epilepsy (walkforepilepsy.org), which takes place Saturday, March 27 on the National Mall. Over the past three years, the walk has raised more than $3 million. The walk is just over 2 miles, so little training is necessary.