(MUSIC) You should be leery of white folks trying to inject African elements into funk. But once in a while (in a lifetime?), as with Talking Heads' Remain in Light, the gambit pays off. Exhibit B: Mahjongg. The Chicago band brings a flinty, urban uptightness to their funkitude, not unlike a Midwestern version of Liquid Liquid, which paradoxically will loosen you up just right. Mahjongg's new RaYDONcoNG will help you get your chaotic groove on as effectively as anything by !!!. (Rendezvous, 2320 Second Ave, 441-5823. 9 pm, 21+.) DAVE SEGAL