Action painting (you know, with the dripping and the splashing, like Jackson Pollock) seems almost quaint in this day and age of over-produced Koons-ian spectacles and market-ready branding, but the abstract expressionist style du jour of the 60s is still very much alive, as you’ll see if you attend a special action painting/contemporary music/performance art event tonight (and repeating June 14). Japanese painter Naoki Iwakawa (at right) and Downtown theater scene veteran Carlo Altomare continue their Excavation collaboration series at Theaterlab (137 W 14th St) this evening. This unique performance has Iwakawa rocking the canvas while Altomare plays the open piano — which is what it sounds like, a manipulation of the various parts of a piano without the use of keys or pedals. There’s no RSVP, so we recommend getting there on the early side of things. The free reception begins at 6:30pm and the performance gets underway at 8pm (recommended donation $10). Click here for all the details.