CMJ. The Union Square Ballroom hosts four separate shows, beginning at 10:30am with orchestral Europop outfit Hey Marseilles. DIIV follows at 12:30pm; the band is led by Beach Fossils guitarist Cole Smith, and delves into dreamy xx-type stylings. Little Green Cars plays at 2:30pm, and Poor Moon closes at 4:30pm. Note that though the performances are free, you'll need to R.S.V.P. at cmj.com/cmjunion.