Spooky DnD One-Shot Adventure - Spooky

The characters are a novice group of adventurers looking after the place for a night.
It is at a hidden quarry which was the site of several murders.
There are a variety of kobolds, sprites and other small-sized creatures attempting to contact a mysterious being. And a plotting cult leader wants to create a safe place for a gnomish flute.
At some point someone discovers a sacrificial chamber.
As the adventure progresses the characters receive a series of visions

The characters are members of a secret society gathering for an initiation. One or more characters have cursed magic items.
It is at a museum of curios which is cursed by a deity.
There are demon cultists enjoying intoxicating mushrooms. And a necromancer is planning a grisly ritual to animate the dead.
At some point something starts following the group.
As the adventure progresses people start to gather for a wedding

The characters are a group of creators gathered for a special exhibition. One or more characters have cursed magic items.
It is at an asylum for the insane which has stone statues in every corner.
There are a variety of kobolds, sprites and other small-sized creatures, scavenging what they can. And an alchemist is attempting to finish a hideous golem.
At some point A former friend of a character arrives seeking revenge.
As the adventure progresses people start to break into a terrible chanting

The characters are students who have heard of a party happening here.
It is at an annual fair which is full of mirrors that sometimes show strange scenes.
There are a family of werewolves performing a rite. And a creature here is possessed by a sentient berserker axe.
At some point a desperate relative of a character arrives.
As the adventure progresses people start breaking into song

The characters are a group of monster hunters chasing a shapechanger. A character thinks there is a big conspiracy.
It is at a derelict ship which is the prison for a fiend.
There are bullywugs worshipping many-eyed creatures. And a jaded dragon seeks to win a sporting event.
At some point something goes missing.
As the adventure progresses it gets colder and there is a snow storm