Landon Azalea Festival – Friday to Sunday – Landon School, Bethesda
Plant and flower sale, carnival rides, food, live music and tours of the 15,000-flower, 2.5-acre Perkins Memorial Garden at Bethesda’s Landon School to benefit student financial assistance and faculty enrichment programs. 10 a.m. to 5 p.m., 6101 Wilson Lane, Bethesda
Rockville Arts Festival – Saturday and Sunday – Town Square
Two-day outdoor festival includes performances, craft demonstrations, art vendors, an outdoor gallery and more in Rockville Town Square, where streets will be closed for a pedestrian thoroughfare and exhibits. 11 a.m. to 5 p.m. Saturday and Sunday. Full schedule available online.
Exhibit: Homefront Street Cars – Saturday and Sunday – National Capital Trolley Museum, Layhill
Special exhibit presents the impact of war on the homefront at the nonprofit museum that also operates trolleys on its grounds. Exhibit continues on weekends through May 26. Noon to 5 p.m. $10 for adults; $8 for children and seniors, 301-384-6088, 1313 Bonifant Road, Layhill.
Strauss Waltz Ball – Saturday – Spanish Ballroom, Glen Echo Park
The 36th annual Strauss Waltz Ball, a benefit for Glen Echo Park Partnership for Arts & Culture featuring lessons, dance cards and carousel rides. Event starts at 8 p.m. Tickets are $30, sold only at the door starting at 7:40 p.m. Carousel rides are $1.25. For more information, call Glen Echo Park, 301-634-2222, or www.WaltzTimeDances.org. 7300 MacArthur Blvd., Glen Echo.
Bethesda Historical Society Book Talk – Sunday – Battery Park Community Clubhouse, Bethesda
Bethesda Historical Society and Bethesda Metro Area Village present a talk by Steve Roberts, author of the 2016 book, “Bethesda and Chevy Chase.” 3 p.m.-4:30 p.m. Free. RSVP requested to bethesdahistory@gmail.com. Battery Park Community Clubhouse, 7908 Glenbrook Road, Bethesda.