BACK PAIN LECTURE, Ali Moshirfar, a physician with Suburban Hospital, discusses spinal stenosis, arthritis, curvature of the spine and other maladies that can cause back pain. 1:15-2:15 p.m., Holiday Park Senior Center, 3950 Ferrara Dr., Wheaton. Free. 301-896-3939.
FLOWER PRESSING CLASS, for ages 7-10, staff member Lynn Richard demonstrates how to collect and press flowers and make note cards; each child will take home a flower press and cards. 4-6 p.m., Brookside Gardens Visitors Center, Children's Classroom, 1800 Glenallan Ave., Wheaton. $12; registration required. 301-962-1451.
SELF-ESTEEM WORKSHOP, Sharon Fountain, a business owner and human resource development consultant, teaches strategies for knowing and claiming self-worth and abilities. 10 a.m.-3 p.m., Commission for Women's Counseling and Career Center, 401 N. Washington St., Suite 100, Rockville. $30; county residents, $20; registration required. 240-777-8300.
DANCE CLUB FRIDAY, Mark Hanak, a keyboard vocalist, plays dance music. 1:15-3:15 p.m., Holiday Park Senior Center, 3950 Ferrara Dr., Wheaton. $4. 301-468-4448.
CONSERVATION BIKE RIDE, bike around the lower Rock Creek area in Chevy Chase; learn about wildlife, habitat, environmental problems; bring a bike and drinking water. 9 a.m.-noon, assemble at Audubon Sanctuary Shop at Woodend, 8940 Jones Mill Rd., Chevy Chase. Free; registration required. 301-652-9188, Ext. 10.
POTOMAC BOOK SALE, sponsored by the Friends of the Potomac Library. 9 a.m.-1 p.m., Potomac Branch Library, 10101 Glenolden Dr., Potomac. Most hardbacks, $1; paperbacks, 50 cents; admission, free. 240-777-0690.
CHILI COOK-OFF, Maryland State International Chili Society's championship cook-off; live music, chili-tasting, choosing of a state champion recipe; partly benefits the National Capital Area's Alzheimer's Association; sponsored by Hard Times Cafe and the Washington Area Parrot Head Club, an organization of singer Jimmy Buffett enthusiasts. Noon-7 p.m., behind the Hard Times Cafe, 13032 Middlebrook Rd., Germantown. Free. 703-801-3154.
GAITHERSBURG HISTORY, a Gaithersburg Community Museum staff member gives a presentation about the main house at Summit Hall Farm Park, an early city landmark; part of the museum exhibit called "Gaithersburg Landmarks and the Tools That Built Them," featuring vintage tools and explanations of how, when and why the tools were used. 1:30-3 p.m., at the museum, 9 S. Summit Ave., Gaithersburg. Free. 301-258-6160.
CHILDREN'S OPERA, for ages 6-12 and accompanying adults and teenagers, a teaching artist from the Washington National Opera discusses the music and characters in Mozart's fairy tale opera "The Magic Flute." 2 p.m., Twinbrook Branch Library, 202 Meadow Hall Dr., Rockville. Free. 240-777-0240.
LOCAL AUTHOR LECTURE, Faith Stern shows slides about her recent travels to Nepal and discusses her new book "Getting There With Faith: Adventures of a Travel Addict." 2-3 p.m., Kensington Park Branch Library, 4201 Knowles Ave., Kensington. Free. 301-897-2211.
EATING DISORDERS SUPPORT GROUP, for people recovering from body-image and eating disorders, sponsored by Eating Addictions Anonymous, a 12-step fellowship. 7 p.m. Saturdays, Holy Cross Hospital, second floor, 1500 Forest Glen Rd., Silver Spring. Free. 301-526-6746.
WWII DEATH CAMP LECTURE, Alan Lukens of Chevy Chase, who is a retired U.S. ambassador to Congo and a member in World War II of the 20th Armed Division of the U.S. Army, discusses his unit's role in the liberation of the Dachau death camp; sponsored by the World War II-Korean War veterans discussion group. 1-2:30 p.m., Margaret Schweinhaut Senior Center, 1000 Forest Glen Rd., Silver Spring. Free. 301-681-1254.
CAMERA-PURCHASE LECTURE, Dwain Heaton of a local camera store discusses camera brands and differences in function, user friendliness and other considerations in evaluating which camera to buy. 1:15-3:15 p.m., Holiday Senior Park Center, 3950 Ferrara Dr., Wheaton. Free. 301-468-4448.
CANCER PATIENTS COSMETIC MAKEOVERS, for women undergoing treatment for cancer. 6:30-8:30 p.m., Holy Cross Hospital, 1500 Forest Glen Rd., Silver Spring. Free; registration requested. 301-754-7158.
SILVER SPRING BOOK TALK, John McPhee's nonfiction book "The Founding Fish"; copies available for checkout at the circulation desk. 7:30 p.m., Silver Spring Branch Library, 8901 Colesville Rd., Silver Spring. Free. 301-565-7689.
AGING PARENTS WORKSHOP, social worker Christiane Graham discusses issues that arise when elderly parents require additional support, techniques for care giving and strategies to maintain balance in your life; resources to assist you will be provided. 10 a.m.-noon, Commission for Women's Counseling and Career Center, 401 N. Washington St., Suite 100, Rockville. $10; nonresidents of Montgomery County, $15; registration required. 240-777-8300.
BLOOD WORK LECTURE, Mary Frances Butler of Holy Cross Hospital discusses what blood work results mean; bring a copy of your own blood work results and ask questions. 10:30 a.m., Margaret Schweinhaut Senior Center, 1000 Forest Glen Rd., Silver Spring. Free. 301-681-1255.
MUSICAL VARIETY SHOW, singer Dale Jarrett performs American music, including patriotic songs for Flag Day, which is Tuesday, Broadway show tunes and songs popular from the '30s through the present day. 1:15-3:15 p.m., Holiday Park Senior Center, 3950 Ferrara Dr., Wheaton. Free. 301-468-4448.
DIVORCE LEGAL ISSUES SEMINAR, a family law attorney from the Montgomery County Bar Association discusses grounds for divorce, spousal support, property distribution, settlement agreements, choosing a lawyer and methods of dispute resolution other than litigation. 7-8:45 p.m., Commission for Women's Counseling and Career Center, 401 N. Washington St., Suite 100, Rockville. $10; nonresidents of Montgomery County, $15; registration required. 240-777-8300.
WHITE OAK BOOK TALK, Toni Morrison's novel "Love"; sponsored by the White Oak African American Book Club; copies available for checkout. 7 p.m., White Oak Branch Library, 11701 New Hampshire Ave., Silver Spring. Free. 301-622-2492.
TRAFFIC SAFETY SEMINAR, for seniors, Joe Schwartz, director of Traffic Services for the Chesapeake Region Safety Council, discusses stopping distances, adverse conditions, distractedness and aggressive behavior. 11 a.m., Margaret Schweinhaut Senior Center, 1000 Forest Glen Rd., Silver Spring. Free. 301-681-1255.
POWER-OF-ATTORNEY LECTURE, lawyer Ira Zimmerman discusses powers of attorney, guardianship and living wills. 1:15-2:15 p.m., Holiday Park Senior Center, 3950 Ferrara Dr., Wheaton. Free. 301-468-4448.
SCIENCE DEMONSTRATIONS, for ages 3 and older, a staff member of the Maryland Science Center presents "What's the Matter?" 2 p.m., Aspen Hill Branch Library, 4407 Aspen Hill Rd., Rockville. Free. 301-871-2094.
WHEATON IMMIGRATION CLINIC, for immigrants and refugees, lawyers and trained volunteers lend assistance on immigration issues. 6-8 p.m., Charles W. Gilchrist Center for Cultural Diversity, 11319 Elkin St., Wheaton. Free. 240-777-4940.
RUNAWAYS SUPPORT GROUP, counseling for runaway youths and their parents or guardians, sponsored by Operation Runaway, a program of the Potomac Ridge Behavioral Health Center and the Montgomery County Police Department. 6:30-8:30 p.m. Wednesdays, 14901 Broschart Rd., Rockville. Free; registration required. 800-204-8600.
YOUTH GRIEF SUPPORT, for students in grades 9-12 who have experienced the loss of a loved one, sponsored by Hospice Caring. 7-8:30 p.m. Wednesdays. Call for location in Rockville. Free; registration required. 301-990-8904.
BASEBALL AUTHOR LECTURE , for ages 5 and older, journalist Fred Bowen discusses his sports novel "T.J.'s Secret Pitch." 7 p.m., Potomac Branch Library, 10101 Glenolden Dr., Potomac. Free; registration required. 240-777-0690.
RAIN FOREST ANIMALS PROGRAM, for ages 5 and older, a staff member of Reptiles Alive presents animals of the rain forest. 7 p.m., Little Falls Branch Library, 5501 Massachusetts Ave., Bethesda. Free. 301-320-4880.
GAITHERSBURG BOOK TALK, Ralph Ellison's novel "Juneteenth," sponsored by the library's African-American Book Club; books available to participants. 7:30 p.m., Gaithersburg Branch Library, 18330 Montgomery Village Ave., Gaithersburg. Free; registration required. 301-840-2515.
COUNTY HISTORY LECTURE, Michael Dwyer, a senior historian for Montgomery County's Park and Planning Commission, shows slides of former buildings and streetscapes of Montgomery County; program held in conjunction with the Waters House exhibit "Lost Montgomery." 8 p.m., Waters House, 12535 Milestone Manor Lane, Germantown. $3; reservations required. 301-340-2825 or 301-515-2887.
BLOOD PRESSURE SCREENINGS, provided by the American Red Cross. 10-11:45 a.m., Aspen Hill Branch Library, 4407 Aspen Hill Rd., Rockville. Free. 301-871-2094.
JOINT REPLACEMENT LECTURE, Suburban Hospital nurse Amy Harris discusses ways to deal with arthritis pain, new techniques available for treatment and joint replacement therapy; members of the team at the Joint Replacement Center discuss returning to an active lifestyle. 1 p.m., Rockville Senior Center, 1150 Carnation Dr., Rockville Free. 301-896-3939.
MUSIC CONCERT, multi-instrumentalist Seth Kibel leads Bob Abbott on bass and Bruce Katsu on guitar in jazz, swing and klezmer. 1:15-2:25 p.m., Holiday Park Senior Center, 3950 Ferrara Dr., Wheaton. Free. 301-468-4448.
ROCKVILLE BOOK TALK, Suzan-Lori Parks's novel "Getting Mother's Body," sponsored by the library's African American Book Group. 6 p.m., 99 Maryland Ave., Rockville. Free. 240-777-0140.
ROSE GARDENS LECTURE, rose specialist Claude Graves shows slides of "Rose Gardens of the World"; June meeting of the Potomac Rose Society. 7:30-9:30 p.m., McLean Governmental Center, 1437 Balls Hill Rd., McLean. Free. 301-869-4948.
-- Compiled by TINA TOLL
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