Buddy Guy is a spry, energetic man of 76 years. He likes to swear and he likes to smile. Watch his 90-minute stage show and you will feel like a richer person than you were before he started. The Chicago blues pioneer played the Peoria Civic Center Theater on Friday night, following a 90-minute set by Jonny Lang. “I’d like to let you know, this is the kind of playing you don’t get on the radio anymore,” he said to, to a smattering of whistles and shrieks, as he grinned slyly from under his cream-colored newsboy cap.