I first thought it was only for fun, but then again, "Moshimo tatta hitotsu dake negai ga kanau nara..." means "If you only have one wish," and didn't Yocchan sing it before Ayu's a capella section, where her fans vote for the songs they wish for her to sing? So basically it's like that section's OP or something, lol. Maybe I should re-watch AT08 MCs again
Not sure why Zin did it though, maybe it was for the games, since the audience requested what games to play as well?
Well, even if it was just for fun, it's still hilarious! XD