Fright Night
One of my favourite horror movies to show people for two reasons 1.Its a really fun movie where you don't need to keep your brain on and 2. It's a really good introduction to 80s horror with the amazing special effects, the campy acting and amazing soundtrack and who could forget the homoerotic undertones to the movie cause for some reason 80s horror has a thing for being really queer for a homophobic era.