Contributing writer and WFMU DJ Billy Jam may boast a mean Irish accent, but he’s all about stateside hip-hop. Hence, the name, I’m guessing, of his event at the Whitney Biennial Saturday, April 19. If you happen to be in the hood – or even if you just wanna listen in via Neighborhood Public Radio’s live stream – check it out: Jam will be helming the turntables along with Demerock Wallnuts from 2-6 p.m., at the Whitney Museum, 941 Madison, NYC. He promises a live jam session with DJ Alf cutting and scratching, as well as freestyle drums, keyboards, and guitar – and spoken word. Oh, yes, and there will be plenty of art – graffiti or otherwise, from both coasts – to see.