CMJ Music Marathon at Rockwood

CMJ. Gigs at Rockwood are billed as CMJ showcases for the next few nights, and some are sponsored by outside presenters. Still, by and large the dense, diverse lineups don't look much different than the usual fare for this lively complex, which now boasts three separate rooms. If you forced us to pick, we'd say Oct 15 is the night to avoid missing, what with choice back-to-back showcases hosted by WFUV and Communion in Rockwood (Stage 2).