The Can't Stop Rockin' Tour, featuring REO Speedwagon, Styx, and .38 Special hit Starlight last night. The tour is what all classic rock tours should be, essentially -- it billed itself as "All Hits, All Night." No new stuff, no solo material to make the guitar player happy -- just the hits. The show delivered what your average classic rock audience wants, presenting all killer, no filler. The performers, as well as the audience, weren't concerned with being cool. You had denim-jacketed frontmen