Margi Cole has long been known as a teacher, at the Dance Center of Columbia College and across the globe, bringing her “Margi-isms” and wacky metaphors to eager dance students. Thousands of “cornfused” students have “run around” in Cole’s classes, trying to figure out the Louie from the Richie. Humor and humility are Cole’s trademarks, cultivating young dancers into skilled entrepreneurs,…