It's hidden in the facial expressions, gestures and tone of voice. The humour here is very subtle but effective all the same. Fine dining, art exhibits and parades, really? Or how would I know, perhaps the jazz was different back in the 80's. What makes the whole idea absolutely hilarious is that this isn't at all something teenagers would do when taking a breather from school.
Presenting 'the 1980's', the golden era of teen flicks.