It’s a mini-music fest at the Yellow Submarine on Friday with a host of bands performing for free as part of the annual Summer Nights series. (Except in this case, it's summer days). The line up at the Yellow Submarine features Nekamat Hatraktor (Tractor's Revenge), who first showed up on the Israeli scene in 1990 and have been rocking hard ever since; Maor Cohen; Punch (for that Indie vibe); and bass man Yehu Yaron. If rock ain't your thing, the Summer Nights series continues through July 19, with free art, dance and music acts at venues across Jerusalem.