Tonight, Ed Zipco's web-magazine Chief is celebrating its two-year anniversary on a rooftop at Roebling and N 8th with something like nine DJs and a secret performance by two of those DJs' regular band. We're not saying who, but if you applied some advanced mathematics to that flyer, you could probably figure out who we're talking about. Fuck it, it's Ninjasonik, OK? Sorry, Ed. The party starts at 6 and is BYOB, D, and A.