The women break into song. They start off slow, with a dubiously tonal “Let There Be Peace on Earth,” but hit their stride with “Ain’t Gonna Study War No More.” After a few verses, it turns into a call-and-response with the crowd. “Sing with us!” calls Paula, a commanding brunette with a “No Drones” shirt. The colorfully striped banner the women hold reads “RAGING GRANNIES” in large black lettering.