Forget the 16 Grammy Awards and Rock and Roll Hall of Fame credentials. How many 61-year-old men can still rock skinny jeans? He's still got it. Sting’s vocals still sound crystalline, his musical chops are uncanny and his catalog is the unabridged manifesto for Rock Theory 101. He's the original hipster - and the flattery is well-earned. For his globe-trotting ''Back To Bass'' tour that hit Red Rocks Amphitheatre on Wednesday night, Sting stripped-down the production value and offered up a no frills, no gimmicks approach show. For the opener ''If I Ever Lose My Faith,'' Sting strolled out on stage with his bass in hand like he was doing a simple sound check. No operatic stage effects, no pyrotechnics, no fluff. It was a refreshing diversion from the overwrought stage designs that most large acts rely on for theatric spunk...