- Terence Young will sign copies of his book “Heading Out: A History of American Camping,” which shows how camping progressed from an impulse among city-dwellers to seek temporary retreat from their exhausting everyday surroundings to a form of recreation so popular that an industry grew up around it. 3:30 to 5:30 p.m. Free. Mall Store, National Museum of American History, Constitution Avenue between 12th and 14th streets NW. 202-633-1000.
Classes and workshops
- A certified yoga instructor will lead a walk-in gentle yoga class targeted to ages 55 and older. 10 a.m. Free. Georgetown Library, 3260 R St. NW. 202-727-0232.
- The Georgetown Library will present a walk-in yoga class practicing introductory vinyasa techniques. 11:30 a.m. Free. Georgetown Library, 3260 R St. NW. 202-727-0232.
- Megan Mamula of Yoga District will present a yoga class for beginners. 1 p.m. Free. Watha T. Daniel/Shaw Library, 1630 7th St. NW. 202-727-1288.
- Jackie Anderson, a certified yoga instructor and librarian at Marie Reed Elementary School, will present a “Family Yoga!” class. 6 p.m. Free. Children’s Room, Mount Pleasant Library, 3160 16th St. NW. 202-671-3122.
- Facilitator Catharin Dalpino of the Washington English Center will lead an Evening English Conversation Group for members to talk about ideas and events and practice conversation skills. 7 to 8:30 p.m. Free. Georgetown Library, 3260 R St. NW. 202-727-0232.
- As part of the Tuesday Concert Series, the Barclay Brass Ensemble will perform works by Bach. 12:10 p.m. Free. Church of the Epiphany, 1317 G St. NW. 202-347-2635.
- The U.S. Navy Band and Navy Ceremonial Guard will perform. 7:30 p.m. Free. U.S. Navy Memorial, 701 Pennsylvania Ave. NW. navyband.navy.mil.
- The U.S. Air Force Band’s Max Impact ensemble will perform an “Upbeat Americana” concert. 8 p.m. Free. West Side, U.S. Capitol. usafband.af.mil.
Discussions and lectures
- Washington Post reporter Dan Zak will discuss his book “Almighty: Courage, Resistance, and Existential Peril in the Nuclear Age,” which tells the 70-year story of the country’s complicated relationship with the manifestations of the nuclear era and of the 2012 case of three anti-nuke activists who broke into the Oak Ridge complex. Joining Zak in conversation will be journalist, producer and author Denise Kiernan. 6:30 p.m. Free. 6:30 p.m. Free. Kramerbooks & Afterwords, 1517 Connecticut Ave. NW. 202-387-1400.
- Sam Kean will discuss his book “Caesar’s Last Breath: Decoding the Secrets of the Air Around Us.” 7 p.m. Free. Politics and Prose, 5015 Connecticut Ave. NW. 202-364-1919.
- Jack Gilbert, professor of surgery and director of the Microbiome Center at the University of Chicago, will discuss his book “Dirt Is Good: The Advantage of Germs for Your Child’s Developing Immune System.” 7 p.m. Free. Children & Teens Department, Politics and Prose, 5015 Connecticut Ave. NW. 202-364-1919.
- Regina Bradley will discuss her book “Boondock Kollage: Stories From the Hip Hop South.” 7 to 9 p.m. Free; reservations required. The Potter’s House, 1658 Columbia Road NW. pottershousedc.org.
- The annual Georgetown Sunset Cinema series — presenting iconic movies with strong female leads and story lines — will feature “Erin Brockovich.” 8:30 p.m. Free. Georgetown Waterfront Park, K Street and Cecil Place NW. georgetowndc.com/sunsetcinema. The series will continue Aug. 8 with “The Devil Wears Prada.”
- Recovery International will host a small group meeting for people coping with issues such as anxiety, depression, bipolar disorder, panic attacks, stress, anger, fear and obsessive-compulsive disorder. 7 p.m. Free. Chevy Chase Community Center, 5601 Connecticut Ave. NW. 202-364-2680.
Performances and readings
- The Zimbabwe dance troupe Mokoomba will present a distinctive mix of traditional Tonga, Luvale and Nyanja rhythms; pan-African music cultures; and generous dashes of rap, ska, soukous and Afro-Cuban music. 6 p.m. Free. Millennium Stage, Kennedy Center. 202-467-4600.
- The Washington Improv Theater’s “Harold Night” will feature long-form improv performances by various ensembles. 8 and 9 p.m. By donation. Source, 1835 14th St. NW. witdc.org.
- Busboys and Poets will present an open mic poetry night hosted by Twain Dooley. 9 to 11 p.m. $5. Langston Room, Busboys and Poets 14th & V, 2021 14th St. NW. 202-387-7638.
- The Tenley-Friendship Library will host a “Summer Fun” edition of its adult coloring program. 5:30 to 7 p.m. Free. Tenley-Friendship Library, 4450 Wisconsin Ave. NW. 202-727-1488.
- Area teens will lead a theatrical tour bringing the National Portrait Gallery’s collection to life through an original play about the people featured in artwork on display. Noon and 1:30 p.m. Free. Meet in the F Street lobby, National Portrait Gallery, 8th and F streets NW. 202-633-1000. The event will repeat daily through Friday at noon and 1:30 p.m.
- The Washington National Cathedral’s “Gargoyle Tower Climb” will feature a close-up look at various gargoyles and grotesques while visiting the open-air walkway wrapping around the two western towers. 6 p.m. $50; reservations required. Washington National Cathedral, Massachusetts and Wisconsin avenues NW. cathedral.org.