Fantasy One-Shot - Spooky

The PCs are members of a faction gathering for an initiation who must befriend/tame a fiendish summoner. One or more characters is currently cursed. It might involve elemental air.
There is a hedonistic band of mercenaries who turns out to be the villain. they are the close relations of a character.
The characters start at a disrupted wedding. Partway through there is a feast. If things slow down it starts or stops raining.
It finishes with a reward of a treasure map.

The characters are a theater troupe working at a special event.
It is at a fortified ship which has a large network of passages underneath.
There are plant creatures creating a strange garden. And a creature here is possessed by a sentient berserker axe.
At some point someone finds a mysterious riddle.
As the adventure progresses people start to break into a terrible singing

The characters are a group of ghost investigators with a covered wagon, investigating a mystery. Two of the characters have fallen in love.
It is at a ruined shipwreck which is infested with bats.
There are hooded snake cultists getting ready for a hunt. And a famous artist is trying to finish a masterpiece by morning.
At some point a drunk friend of a character arrives.
As the adventure progresses a great evil starts to escape its prison

The PCs are a group of ghost investigators with a covered wagon, investigating a mystery who must subdue a wealthy pack of ghouls. It might involve acolytes.
There is a hedonistic alchemist who betrays them partway through.
The characters start with an escaped monster. At some point they spot foes who are unaware of them. If things get stuck someone discovers a hidden coffin.
At the end there is feasting in an inn. Possible sequel... the adventure becomes the first of a multi-part quest around the same theme

The characters are members of a faction gathering for an initiation. A character is accompanied by an annoying friend.
It is at a hidden chasm which is used to hold a herd of donkeys.
There are a gang of cultists studying a shadowfell crossing. And a stern investigator wants to collect a bounty on a reclusive horror.
At some point A former friend of a character arrives seeking revenge.
As the adventure progresses more and more things light on fire