ALCOHOLICS ANONYMOUS, 2-3 p.m., Conference Room 2/3, Potomac Hospital, 2300 Opitz Blvd., Woodbridge. 703-445-0777.
"DRUMMING UP," for middle and high school students, an exploration of rhythm and drums. 2 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free; registration required. 703-792-4800.
PRINCE WILLIAM PURLERS KNITTING GUILD, 7-9 p.m., Baptist Outreach Hearth and Home Senior Adult Day Care Center, 8730 Sudley Rd., Manassas. 703-802-1249.
TOASTMASTERS INTERNATIONAL, 7-9 p.m., Ebenezer Baptist Church, 13202 Telegraph Rd., Woodbridge. 703-680-3203.
NATURE CAMP, for ages 8-12, sponsored by Friends of Bull Run. 9 a.m.-4 p.m. today through Friday. Bull Run Mountain House, 17405 Beverly Mill Dr., Broad Run. Members, $135; nonmembers, $185. Reservations required. 703-753-2631.
STORY TIME, for ages 3-7, with a caregiver. 7:15 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free. 703-792-4800.
COMPUTER BASICS WORKSHOP, 9 a.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge. Free; registration required. 703-494-8126.
COLLEGE FINANCES, preparation workshop for parents and students. 7 p.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge. Free; registration required. 703-494-8126.
ALL ABOUT ANIMALS, for children 3-7, with a caregiver. 7:15 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free; reservations required. 703-792-4800.
WRITERS ROUNDTABLE, 7:30 p.m., Francis Cannon VFW Hall, 9304 Centreville Rd., Manassas. 703-494-4260.
BULL RUN TROUBADOURS, 7:30 p.m., Trinity Episcopal Church, Battle and Church streets, Manassas. 703-753-2249.
PRINCE WILLIAM CHESS CLUB, 7-9 p.m., Game Parlor, 14400 Smoketown Rd., Woodbridge. 703-670-5887.
PARENTING CLASSES, to help parents who are living apart work out child-care decisions. Sponsored by the Prince William Cooperative Extension Service. 7-9 p.m. today and Aug. 11. North Government Building, 7987 Ashton Ave., Manassas. $35; registration required. 703-792-6288.
TAKE OFF POUNDS SENSIBLY, weight-loss support group. 9-11 a.m., Prince William Senior Center, 13850 Church Hill Dr., Woodbridge. Free. 703-494-2692.
WRITERS GROUP, 7:30 p.m., Borders Books & Music, 2904 Prince William Pkwy., Woodbridge. 703-897-8100.
TOASTMASTERS INTERNATIONAL, Lake Ridge Club No. 8913. 7:30 p.m., Tall Oaks Community Center, 12399 Hedges Run Dr., Lake Ridge. 703-494-5530.
WIDOW AND WIDOWERS SUPPORT GROUP, for people 55 and younger, sponsored by Potomac Hospital. 7:30-9 p.m., Potomac Hospital, 2300 Opitz Blvd., Woodbridge. 703-670-1722.
BEREAVEMENT SUPPORT GROUP, 7 p.m., Bethel Lutheran Church, 8712 Plantation Lane, Manassas. 703-368-9800.
LA LECHE LEAGUE, 7:30 p.m., First United Presbyterian Church, Minnieville Road and Cardinal Drive, Woodbridge. 703-590-4181.
MANASSAS-WARRENTON CAMERA CLUB, 7:30 p.m., Manassas City Hall Council Chambers, first floor, 9027 Center St., Manassas. 540-439-0566.
OLD TOWN BUSINESS ASSOCIATION, 8 a.m., Manassas Museum, 9101 Prince William St., Manassas. 703-257-7895.
TEEN POETRY WORKSHOP, 7 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free; registration required. 703-792-4800.
FAMILIES ANONYMOUS, for parents of children with substance abuse problems. 8:30 p.m., old Marsteller School building, Room 24, 8730 Sudley Rd., Manassas. 703-530-8973.
FARMERS MARKET, 7 a.m.-1 p.m., Church Street, next to the fire station in Old Town Manassas. 703-361-6599.
ALCOHOL RECOVERY MEETING, Back Door Friends. Noon, River Woods Community Center, 16573 Nanticoke Rd., Woodbridge. 703-221-5513.
RECYCLING PROJECT, accepting newspapers, magazines and aluminum cans, sponsored by Boy Scout Troop 1196. 9 a.m.-1 p.m., Woodbridge Senior High School, 3001 Old Bridge Rd., Woodbridge. 703-590-0511.
FARMERS MARKET, 7 a.m.-2:30 p.m., Church Street, next to the fire station in Old Town Manassas. 703-361-6599.
RECOVERY INC., for people experiencing anxiety, depression, fear and other emotional problems. 10 a.m.-noon, Cokesbury United Methodist Church, 14804 Blackburn Rd., Woodbridge. 703-490-5423.
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