The Palace at the End of the World (1970)

Sinopsis

Max's mum is crying into her wine, his dad is refusing to look away from the TV and his nan seems to only be worried about whether she is missing Emmerdale... oh... and there's a comet about to destroy the world. A journey into the night finds Max partying with a bunch of costumed queers. But as the end of humanity fast approaches he must decide where he truly wants to spend his last moments on Earth.