What the heck happens at this tavern?

[New Earth Man]

So lately I've been working on an adventure concerning the characters tracking down a particular character. This character is a Ghoul with the Civilized Ghoulishness Feat. They've been able to track him down to a place called Afterlife which is a sort of out of the way and secret 'club' that happens to be built inside an ancient mausoleum. People do opiates, perform depraved acts, blah, blah and it is loosely based off of the Hellfire Club of the late 1800's.

Problem is, I don't really know what I want to happen here besides them eventually finding this ghoul and chasing him down into the sewers. I feel like the location is WAY too good to not do something with it but I'm at a loss. Can anyone suggest things that happens at this strange little club?

Thanks in advance!

[lucky7]

Souls are gambled, bargained, and stolen, behind curtains of quivering flesh.

The main act is a patron who ran out his tab being put in a bronze bull.

[Paladin of Baha-who?]

Flagged for moving to the advice forum.

Do you want this to be a true den of iniquity? Or just a place where anyone, including the undead, can come and let their shawls down?

You could consider making it a brothel -- they say there's nothing like a cold woman on a warm night.

[ccs]

The deeper into the club the PCs go, the worse they'll find going on.

The players might encounter several prominent people.
They find assorted sex/torture/etc.
Gambling.
Drugs.
A ghoulish feast.
They walk into a backroom buissiness deal taking place.
They're offered a job? Make new contacts?
Dark rituals?
Once the alarm has been raised that the club has been infiltrated though, it's not just a chase into the sewers but a fight....

Of course the real danger is fallout down the line. Those prominent people might well move against the party to keep their deranged activities secret. Or to avenge a ruined $ deal. Or the undead try & keep their presence a secret.

[New Earth Man]

All good advice, thank you!

The place is supposed to, at least on the surface, look like a normal den of delights with a sort of unusual twist to it - in that its in the middle of a cemetery. There are a few minor practitioners of magic. But yeah, the deeper they go, the more serious things get. The club is owned by the guy (They call him Mr. Whisper) who is the Ghoul they're looking for. He's a sorcerer who specializes in Illusion and of the Ghoul Bloodline. Think Nosferatu from Vampire the Masquerade.

[Calex]

The Hellfire Club offers some good info in a handy, cheap & small paperback.

[justaworm]

There is a web fiction story, I can't recall which one scanning the list, of a club of undead that meet for "dinner parties" . Someone will prolly be able to chime in on the name, but that is a good one.

Also, in second darkness, in the drow city, I think there is some ideas that may help you too.