They’re playing a game where you have to guess what the song is by listening to the intro. Only the person who has the ping pong ball can answer.
(34:29-34:56) Miyazawa: Shoujo Jidai’s Gee MC: Correct! You guys weren’t able to move Kenchi: I didn’t know it at all MC: Wait, I thought you liked them Gekidan Hitori: No, it’s KARA. Don’t get it wrong. That’s the worst mistake to make MC: A delicate issue
(39:08-39:45) Takahashi: What is this MC: You know this, you know this Gekidan: Ah! MC: Don’t lie Gekidan: No, really Miyazawa: Wait, which is it? Gekidan: I know, I know, I know Miyazawa: Is it that? Gekidan: I know it! Put it down if you don’t! If you don’t know it, put it down! Put it down, put it down! If you don’t know it, put it down! Miyazawa: Mister Kenchi: That’s one you should have gotten Gekidan: I’m disappointed (that I didn’t get it) MC: That’s like the only reason you were here for Gekidan: I know Yoshimura: He couldn’t run at all because he was wearing sandals