I think this was honestly my favorite bit of the episode. I thought their honor was challenged just because singing overall, and expected some drinking songs or klingon opera. I was so totally taken off guard by it, it absolutely made the entire episode imo. I barely even remember what it sounded like after the first second because I was laughing so hard.
I honestly think the 60s special effects are one of my favorite aspects about TOS. They’re silly and corny and the suspension of disbelief is nonexistent but it wouldn’t be the same without them. That, and also the dramatic lighting in the closeups and the extravagant eye makeup on literally everyone lol.