Promoters Rare Form and the Hip Hop Karaoke crew are hooking up for what should be a mad collision of hip-hop party forces: Off the Books. Rare Form promotes the weekly Freedom party at the Canal Room and presented J Dilla’s Brooklyn tribute event, and HHK knows how to put together a sincere throwdown: We’ve been raving about their events since forever, so what’s keeping you from the mic? The first part of the evening will call up all you Salt-n-Pepa wannabes onstage, and with a limited number of sign-up slots, you should arrive early. The second half of the event consists of DJ Parler spinning old-school and original samples. Word to the wise: These parties have been known to go on until the bitter end, because this sort of hookup always gets messy.

Fri., May 2, 9 p.m., 2008