On Sept. 12 from 6 to 9 p.m. at the National Gallery of Art, East Building, Fourth St, NW, relive best or worst school dance memories with classic summer jams by DJ Heat. Draw a Picasso-inspired portrait. Take a spin on the NGA trivia wheel. Pop-up talks explore elements of art. Tracy Wilson and Holly Frey, hosts of the hit podcast Stuff You Missed in History Class, look at the lesser-known history of the color blue during a live show. Admission is free; food and beverages on sale. Register at eventbrite.com.