Born Today: Margo Sappington Choreographer Margo Sappington (1947-) danced with the Joffrey Ballet in the 1960s and performed in Promises, Promises (1968) on Broadway. Near the end of the decade she wrote, choreographed, and performed in the outrageous off-Broadway revue Oh! Calcutta! (1969) and later in the 1970s he choreographed…