Many of us spent years of late nights enjoying Doc Severinsen on “The Tonight Show with Johnny Carson.” Today, Doc, 85, performs on the road at colleges and universities, and with symphonies. He’s touring right now and made a recent appearance with the Colorado Symphony Orchestra, which we learned about through a blog post by friend of EngAGE, David Bondelevitch. Click here to see a performance of “Georgia,” earlier this year in Lexington, Kentucky.