Kevin Hart Just Might Be the Hardest-Working Man in Branding

"Grind time, baby!" Kevin Hart is ready for the day. In fact, he's pumped. On this particular morning in early September, Hart's about to plug the hell out of his new movie, Night School, on morning radio and television in Atlanta. The comedy, which he cowrote and stars in opposite Tiffany Haddish, is about to...