MONDAY >> Remember when rap-rock was cool? We try to repress the memories, but some bands just won’t let us forget. San Diego-based P.O.D. is one of those bands. If you’re feeling sentimental, they’ll be at the 9:30 Club, along with Pillar, The Chariot, and Maylene and the Sons of Disaster, as part of the Warriors Tour. It’s doubtful that “Warriors” is a slick reference to Walter Hill’s 1979 classic movie, but you never know….