This morning, I had the honor to take Dreamgirls cast member Aubrey Poo (pronounced Poh-oh) to four radio stations for interviews. (Thank you, Bob, Phil, Carmelina, Kiki and Carlos!) Aubrey is a South African native and speaks with an accent that delighted everyone he met.    He and I talked about theater and about apartheid, South Africa’s sanctioned racism. Apartheid came to its legal end in…