One more week for “Song 1” at the Hirshhorn. (Ben de la Cruz/The Washington Post)

Even though this weekend isn’t the end for Doug Aitken’s ambitious projection project, Friday night is still shaping up as the highlight of its two-month run. The “Song 1 Happening” (detailed in Nightlife Agenda) is the museum’s latest after-hours event, and it features live performances from No Age, Oneohtrix Point Never, Nicolas Jaar, High Places and a DJ set by Animal Collective’s Geologist. (It’s not a “hip D.C. after-hours event” unless Geologist is spinning, don’t you know?)

Also from the archives: an interview with No Age; a live review of No Age at the Black Cat; an interview with Oneohtrix Point Never; and an album review of OPN’s excellent recent album, “Replica.”

If you’ve got four hours to kill on a Friday afternoon, the Hirshhorn announced a symposium for Friday afternoon, “Art in the Expanded Field,” which features New Yorker pop critic Sasha Frere-Jones, Los Angeles Times writer and Aitken collaborator Dean Kuipers and Cincinnati Art Museum director Aaron Betsky, among others.

Read more from the Going Out Guide:

Hirshhorn piece is all about projection

Song 1: A Happening

Nightlife Agenda: Cut Copy DJ set and No Age at the Hirshhorn