STRANGE TRIP: Founding members of the band Ripple, a favorite of Deadheads long ago, are back as Dead To the Core at the Gateway for ‘an authentic, high-energy electric celebration,’ as bassist/vocalist Ronnie Penque put it. (Supplied Photo) Long Beach Island is about to experience a massive wave of 1990s Jersey Shore music nostalgia when Dead To the Core hits the stage at the Gateway in Ship Bott