Oh Oaklanders, we are about to yet more nightlife in coming months. First, the owners of B Restaurant and Bar, Air lounge and FIVEten Studio are collaborating on a split-level art bar and gallery, ERA. Patrons will want to get out on the dancefloor because of the DJs who will spinning — some of them big-name hot shots. Era is going to be slick enough to give San Francisco a run for its money, according to Kevin, co-founder of B. It also will be a welcome addition when it opens around January to the Broadway/Grand interesection just across the street at 19 and 21 Grand from Luka’s, Ozumo, Vo’s and the galleries, plus the new Bakesale Betty’s store. Not too far away, near the SEARS building on Telegraph is AVE, where the old Bear Cave is.