After the monsters had all formally introduced their 'characters' to the audience, and then to each other. It was mostly a dramatic reenactment of their first meeting, with revisions by each to more properly endear them to the audience. They did want to put on a good show still.
The still human members of the audience in particular liked the interaction between Frakenstein's Monster and the Cursed Doll, her seeing him as a father figure, and he wanting to be a better parent than the doctor had been to him. And they were both artificial beings made in the image of humans.
There was also the long standing bond between the Wolf Man's family and Dracula.
And The Mummy and The Dragon most moaning like a couple of old men about the loss of the good old days.
Nate in the front row, the first to transform there, naked and free, wild and savage, his humanity a dim thing of the past. He grinned his fangs at the Wolf Man, eager to watch the performance to the end, sniffing the air and sensing more humans being added to the pack. This included Gary, the werewolf fanatic who was now what he had always found interest in.
One young woman in the audience, who unlike most there had always had a 'thing' for the 'poor misunderstood' types of monsters and found them alluring. Her name was Shelly. Her skin turned a tinted green, while stitches appeared on her wrists, ankles, hips, shoulders, and neck, along with one going down her chest. Another formed around the crown of her head. Next appeared the bolts in neck. Her hair turned wild as if struck by lightning. She grew taller and stronger. She shuddered as if indeed she'd been struck by lightning. She was now several parts of different women, brought back to life by the mad science of Doctor Frankenstein himself. She was also going to get her wish of marrying The one Monster who was the only one present who was actually poor and misunderstood in his original incarnation rather than being tamed by the modern world. She was the first to change, an The Monster was pleased to at his new prospective wife. She wouldn't be the only one to change of course, The Monster would no longer be alone as more of his father's creations made into the world.
A no nonsense goth named Maggie, meanwhile, wondered when they'd get to the part of the monsters eating people, this was supposed to show monsters being MONSTERS after all, so have them do something monstrous already! Her skin turned sickeningly pale, a set of fang marks appeared on her neck, she... actually LOST of her more over the top black make up, and her black hair actually turned to its already natural platinum blond color. Her goth dress actually gained some pretty jewelry. Her canines grew into fangs, while her nails became claws. Her chair shifted and charged around her, folding around her into the shape of a coffin with a lid, still open though, she wanted to see where the show went with Master Dracula himself performing. She wanted to suck one of the nearby stupid humans dry, but it was not her place.