Musician Robert Cray will walk onto the stage Sept. 16 at the Charleston Music Hall and let 50 years of the blues flow through his guitar. For five decades, Cray and his namesake band have been crisscrossing the globe, carrying on the tradition of the blues while adding modern rock ’n’ soul touches. It’s called that because, well, that’s basically what a tour is, right? And then there’s always time to call for something out of the blue, as well.”It’s interesting that Cray referenced “what this particular band knows,” because the current Robert Cray Band lineup features bassist Richard Cousins, keyboard player Dover Weinberg and drummer Les Falconer. I’m really fortunate to be able to do something that I enjoy as much as I do.”IF YOU WANT TO GO: Doors open at 7 p.m., Sept. 16, Charleston Music Hall, 37 John St., Charleston.