Two rooms, two floors and untold levels of global bass take over the Echo and Echoplex for this meeting of two of L.A.'s most crushing club nights. Dub Club does just what you'd think but with even more enthusiasm and precision, delivering reggae and its many descendents with various contributors on the mic. Boyle Heights' storied Subsuelo outfit (which won a Best Eastside Club Night from this very paper) deploys speaker-bursting, pan-Latin selections spanning several genres, generations and continents. The occasional nights when these two crews come together mean that you've got the best musical production from probably half the planet in play all at once — dub, reggae, dancehall, funk, cumbia, hip-hop, soul and more. Prepare to go past the unexpected toward the simply unprecedented.