Luckily, Jack's seen his outfit before and knows he didn't dress specially for the occasion. Also, he's much less interested in that and much more in having snagged a dance partner.

"Dancing!" he answers, somewhat breathlessly but with a big grin, attempting to link elbows with Zelgadis and skip round with him. It's totally silly, but it's impossible to feel down whilst doing it and that's what matters!