At the end of the party, Obama looked out into the crowd, searching for Dave Chappelle. “Where’s Dave?” he cried. And then, finding him, the president referenced Chappelle’s legendary Brooklyn concert. “You got your block party. I got my block party.” Then the band struck up Al Green’s “Love and Happiness”—the evening’s theme. The president danced in a line next to Ronnie DeVoe. Together they mouthed the lyrics: “Make you do right. Love will make you do wrong.”