Naturally, the stuffy old people ... love it? And not only do they love it, two of them get pretty quivery in the loins over it. An old dude who looks exactly like Prince Charles (and is comedy legend Milton Berle) leers at a Monty Python actor in drag (also comedy legend Milton Berle -- his nephew was the band's manager at the time, you see), who caresses her boobs in terrifying anticipation. The two then run off to fuck, and you never see them again.
Just like Milton Berle.
Later on, a young girl goes upstairs after getting turned on by her butler's blatant champagne cock. Once there, she loses her dress and hair, transforming into a zombie Jamie Lee Curtis wearing silver lipstick all of a sudden. Also, her gown suddenly has shoulders in place of the strapless number she wore literally four seconds before.
"Are you the Crapmaster? I am the Crapkeeper."
And then the big reveal. Perhaps you were wondering how Ratt managed to evade security systems and vicious dogs and gain access to this fancy mansion in the first place. Well, like a stereotypical murder mystery, it turns out the butler did it. Yes, Alfred and the band were in cahoots the entire time, a turn made abundantly clear by the plate of rats he unleashes upon the partygoers.
Eventually, the band's rockin' becomes hard enough to send the guitarist crashing through the ceiling. After landing on the table, he launches into an unplugged guitar solo that sends every remaining guest running away in terror.
By this point, everything has completely gone to shit. There's massive property damage, pests are everywhere, and the zombie's still gyrating to absolutely nothing. But none of that compares to the sight of the butler rocking out, clad in full leather and denim that he just happened to have stashed away somewhere, along with what appears to be lipstick.
Honestly, it could have turned out much worse.