CONCERT, violin and viola. 2 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free; registration requested. 703-792-4800.
FARMERS MARKET, 8 a.m.-1 p.m., Dale Boulevard and Minnieville Road, in the commuter parking lot behind Center Plaza, Dale City. 703-670-7112, Ext. 223.
ALCOHOLICS ANONYMOUS, 2-3 p.m., Conference Room 2/3, Potomac Hospital, 2300 Opitz Blvd., Woodbridge. 703-445-0777.
BLOOD DRIVE, sponsored by the American Red Cross Prince William Chapter. 3:30-8 p.m., Bethel Lutheran Church, 8712 Plantation Lane, Manassas. 703-368-4511.
CABIN BRANCH QUILTERS, 7:30 p.m., Lake Ridge Baptist Church, 12450 Clipper Dr., Woodbridge. 703-491-9634, www.cabinbranch.org.
WOMAN'S CLUB OF MANASSAS, 7 p.m., Trinity Episcopal Church, 9325 West St., Manassas. 703-401-7609.
PFLAG MEETING, Parents, Families and Friends of Lesbians and Gays. 7 p.m., Bull Run Unitarian Universalist Church, 9350 Main St., Manassas. 301-439-3524, www.bruu.org.
PERSONAL FINANCE SEMINAR, 7-8:30 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free; registration required. 703-792-6287.
ENGLISH CONVERSATION CLUB, for new speakers of English to practice their skills. 6 p.m., Bull Run Regional Library, 8051 Ashton Ave., Manassas. Free. 703-792-4500.
STORY TIME, for children ages 2-6 with a caregiver. 7:15 p.m., Chinn Park Regional Library, 13065 Chinn Park Dr., Woodbridge. Free. 703-792-4800.
ALZHEIMER'S CAREGIVER SUPPORT, 7 p.m., Prince William Senior Center, 13850 Church Hill Dr., Woodbridge. 703-792-4991.
CARDIAC SUPPORT GROUP, for patients and family members, sponsored by Potomac Hospital. 7 p.m., Potomac Center (next to the hospital), 2296 Opitz Blvd. Suite 320, Woodbridge. 703-221-2500.
GENEALOGY RESOURCES WORKSHOP, an informal forum to share information about genealogy software, electronic resources and Internet sites, sponsored by the Prince William Public Library System. 7:30-8:30 p.m., Bull Run Regional Library, 8051 Ashton Ave., Manassas. Free; registration required. 703-792-4540.
INTERNET BASICS, 7 p.m., Potomac Community Library, 2201 Opitz Blvd., Woodbridge. 703-494-8126