The Clustcwyr Christmas Do (aka Cyngerdd Canol Gaeaf yn Clustcwyr) is an annual event held at the Clustcwyr Studios, usually (but not universally) on 21st December. A headline act (given in bold type here) play a full set, with supporting performances throughout the evening. It's a claustrophobic event with much drinking and nibbles. Some years have been memorable, some are best forgotten. Here are the running orders:
 
Grand Opening:
May, 1975
Gorwel Edwards and the Maniacs
Metal Headed John Craven
Christmas, 1975
Gorwel Edwards and the Maniacs
Christmas, 1976
Maxwell's Mechanical Monkey Wrench
The Seed
John Craven & Ike Imeson
The Cookie Crumbs, Live:
August, 1977
The Margarets
Cathy Carrow and the Cookie Crumbs
Christmas, 1977
Maxwell's Mechanical Monkey Wrench
The Margarets
The Cookie Crumbs
 Noswyliau Nodwydd:
August, 1978
Dirywio
The Murderous Gorwel Edwards
Dirywio
Anhrefn yn Clustcwyr:
Christmas, 1978
The Seed
The Margarets
Dirywio
Christmas, 1979
The Cookie Crumbs
John Craven with Ike Imeson
Christmas, 1980
The Margarets
The Cookie Crumbs
The Craven Angel Lives!:
July, 1981
John Craven and the Angels of Death
Christmas, 1981
The Margarets
The Seed
Christmas, 1982
Cathy Carrow
The Margarets
Christmas, 1983
Petra & Polawski (DJ-ing with electric noodlings, throughout the night)
Helena's Box
The Gorwel Edwards Liberation Front
Christmas, 1984
Petra & Polawski (DJ-ing with electric noodlings, throughout the night)
Adam Lucas & Jo Hustler
Helena's Box
Christmas, 1985
Petra & Polawski (DJ-ing with electric noodlings, throughout the night)
The Margarets
Helena's Box
Christmas, 1986
Petra & Polawski (DJ-ing with electric noodlings, throughout the night)
Helena's Box & The Margarets
Christmas, 1987
The Moisture Farmers
Helena's Box
Christmas, 1988
The Moisture Farmers
The Angels of Death
Christmas, 1989
Cathy Carrow & The Margarets
The Moisture Farmers
Christmas, 1990
The Moisture Farmers
The Angels of Death
Christmas, 1991
Rotten Fruit
The Moisture Farmers
Christmas, 1992
Cyfeb
Cathy Carrow & Julie Mason, with Dafydd Morgan & Tim Gower
Rotten Fruit
Christmas, 1993
Rotten Fruit
The Moisture Farmers
Cyfeb a John Craven
Christmas, 1994
John Craven, with Dafydd Morgan and Chris Holland
Rotten Fruit
Cyfeb
Christmas, 1995
Helena Jones, with Josh Rose, Daniel Curran and Dafydd Morgan
Llefrith
Christmas, 1996
Helena Jones, with Josh Rose, Daniel Curran and Dafydd Morgan
Diwylliedig
Julie Mason with Josh Rose and Tim Gower
Christmas, 1997
Diwydianfa
Rhonwen Stephens
Christmas, 1998
The Science Department (DJ-ing with electric noodlings, throughout the night)
Adam Lucas & Jo Hustler
Rhonwen Stephens
Christmas, 1999
The Science Department (DJ-ing with electric noodlings, throughout the night)
Diwydianfa
John Craven and the Science Department
Christmas, 2000
Rhonwen Stephens
Mosfet
Vivus:
August, 2001
Magenta Moor
Et Cetera
John Craven & Ike Imeson
Adam Lucas & Jo Hustler
Et Cetera
In Memorium Cathy Carrow:
Christmas, 2001
Mosfet v Autoparp
Llefrith
Gorwel Edwards & Dafydd Morgan
Magenta Moor (originally lined up as headliners)
Autoparp (with Julie & Tim Gower) / The Margarets
Christmas, 2002
Autoparp (DJ-ing with electric noodlings, throughout the night)
Rhonwen Stephens
Llefrith
Magenta Moor
Christmas, 2003
Autoparp (DJ-ing with electric noodlings, throughout the night)
Llefrith
Magenta Moor with John Craven
The Day of the Dafydd:
Christmas, 2004
Autoparp v Mosfet (DJ-ing with electric noodlings, throughout the night)
Julie & Tim Gower
Llefrith
Et Zenda
Diwydianfa
Rhonwen Stephens
Helena Jones & John Craven
Christmas, 2005
Autoparp (DJ-ing with electric noodlings, throughout the night)
Rhonwen Stephens
Et Zenda
Llefrith
Helena Jones & John Craven
Christmas, 2006
Autoparp (DJ-ing with electric noodlings, throughout the night)
Llefrith
Et Zenda
Rita Fairclough (Effectively a Cookie Crumbs revival consisting of Helena Jones, Llefrith, Autoparp, John Craven, Kelly McEllerhorne and Daniel Curran)
Christmas, 2007
(Cwmanne Tavern)
Helena Jones & John Craven
Et Zenda
Llefrith's Caroling Lock-In
33 1/3 (reopening):
September, 2008
Autoparp (DJ-ing throughout the night)
Llefrith
Helena Jones & John Craven
Et Zenda
Christmas, 2008
Autoparp (DJ-ing throughout the night)
Helena Jones & John Craven
Et Zenda
Chwen Deilwra!
Llefrith
Christmas, 2009
Autoparp (DJ-ing throughout the night)
Delicious Robot Love
Llefrith
Et Zenda
Helena Jones
Rhonwen Stephens
Christmas, 2010
Autoparp (DJ-ing throughout the night)
Helena Jones
Delicious Robot Love
The Pine Apples
Llefrith
Christmas, 2011
Autoparp (DJ-ing throughout the night)
Eogiaid
Chocolate Lab
Llefrith
Death of the Craven Angel:
Easter, 2012
Autoparp & The Science Dept. (DJ-ing with electric noodlings, throughout the night)
Et Zenda / Magenta Moor
Jules et Tim
Helena Jones, Llefrith, and Autoparp
The Angels of Death
Christmas, 2012
Autoparp (DJ-ing throughout the night)
Et Zenda
Julie & Tim Gower with Helena Jones
Llefrith
Christmas, 2013
Autoparp (DJ-ing throughout the night)
Et Zenda
Relish
Julie & Tim Gower with Helena Jones
Llefrith
Christmas, 2014
Autoparp (DJ-ing throughout the night)
Helena Jones
Et Zenda
Jules et Tim
Rhonwen Stephens
Llefrith
Christmas, 2015
Autoparp (DJ-ing throughout the night)
Rhonwen Stephens
Et Zenda
Helena Jones
Palas y Cwm
Llefrith
Christmas, 2016
Autoparp (DJ-ing with electric noodlings, throughout the night)
Jules et Tim
Et Zenda
Helena's Box
Rhonwen Stephens & Autoparp
Christmas, 2017
Autoparp (DJ-ing with electric noodlings, throughout the night)
Et Zenda
Jules et Tim
Helena's Box
The Margarets