Charles Johnson 3600 Park East Dr., Beachwood, 216-765-8085; Severance Center, 3554 Mayfield Rd., Cleveland Hts., 216-382-2730, www.ballyfitness.com
When, in the 15th minute of a 60-minute boot-camp class, Charles Johnson lets loose a hearty "Let's go," you feel like going, all right -- right out the door. But you can't, because Charles won't let you, and because there are about 60 other sweat-laden fitness zealots blocking your getaway route. Johnson, a former zoology major and current personal trainer at Bally's in Beachwood and Cleveland Heights, knows how to work a room better than any politician. At the end of any of Johnson's workouts, you'll have the aching quads, shaky arms, and shortness of breath to show for it.