The story was about a diner in a small town that sat on a door to another dimension. Lovecraftian horrors were trying to get into our world. A werewolf & a vampire in a pickup truck were trying to stop it. The villain was a local HS girl, Asian, who, with the help of her bumbling boyfriend, was trying to open the path. A female graveyard ghost was also featured. This was played for laughs.
It was mentioned on the SDMB a year or two ago.
What was the title?