The guy with the baton is Mitch Miller. He had the corniest TV show you ever saw, with a chorus singing old songs like "The Yellow Rose of Texas" or "In the Good Old Summertime," with lyrics on the screen so audiences at home could join in. SING ALONG WITH MITCH was incredibly popular. The gimmick was used before in 1930s cartoons shown in theatres.
The fellow in the Hawaiian shirt looks to me like Adam Clayton Powell Jr. He was from Harlem and served in the House of Representatives for decades. Always in controversy, people loved him or hated him.