What's Doing

"SLAPSTICON SILENT COMEDY Film Festival " -- Friday 9 a.m. to midnight, Saturday 9 a.m. to midnight, Sunday 10 to 6. Screenings of dozens of rare silent comedy films starring Charlie Chaplin, Mabel Normand, Laurel & Hardy and others. $20 per day, or $75 for all. Rosslyn Spectrum, 1611 N. Kent St., Arlington. 703-228-1841 or www.slapsticon.org.

LIVE BUTTERFLY SHOW -- Open daily from 10 to 4, through Sept. 18. Butterflies fly freely in an indoor garden of nectar plants. $4.50, ages 3 to 12 $3.50. Brookside Gardens, 1800 Glenallan Ave., Wheaton. 301-962-1400.

"ARTRAIN USA" -- Friday noon to 7, Saturday noon to 7 and Sunday noon to 5. Exhibition of "Native Views: Influences of Modern Culture," 71 artworks by 54 Native American artists in three traveling railroad cars. Adjacent to City Hall at Main and Center streets Manassas. 800-278-1971.

"FANEX 18" -- Friday 5 to 10, Saturday 11 to 10. Screenings of genre films, panel discussions, writers workshops, vendor tables. $5. Embassy Suites North, 213 International Circle, Hunt Valley. 410-584-1400.

FLEA MARKET -- Saturday 9 to 2. College Park United Methodist Church, 9601 Rhode Island Ave., College Park. 301-474-7874.

RUMMAGE SALE -- Saturday 9 to 4, by the Greenbelt Labor Day Festival Committee at Roosevelt Center, Crescent Road and Southway, Greenbelt. 301-910-0050.

ASIAN FESTIVAL -- Saturday 10 to 9, celebrating the cultures of Thailand, China, India, the Phlippines, Japan, Korea and Vietnam. Entertainment on two stages, crafts vendors, exhibits, foods from 25 Asian restaurants, women's tennis tournament. Lake Newport Tennis Park, 11452 Baron Cameron Ave., Reston. 703-589-4144.

PEACH FESTIVAL -- Saturday noon to 5. Crafts boutique, bake sale, dinner. Eastport United Methodist Church, 926 Bay Ridge Ave., Annapolis. 410-263-5490.

"SCREEN ON THE GREEN" -- Free feature films screened Mondays at dusk through Aug. 15 on an outdoor screen. Monday, "Suspicion" (1941). On the Mall between Fourth and Seventh streets. 877-262-5866.

"SUNSET PARADE" -- Tuesdays at 7, through Aug. 16. The Marine Drum & Bugle Corps, Silent Drill Team and marching units stage a colorful full-dress parade at the U.S. Marine Corps War Memorial (Iwo Jima Memorial), on U.S. 50 adjacent to Arlington National Cemetery. 202-433-6060.