The Gathering was started in 1991 by improv legend Maggie Nicols and others and still takes place regularly to this day in London with an annual Grand Gathering at her home; the Melin Dolwion mill in Wales. The format for the gathering has been for anyone to turn up and join in a free improvisation. The Grand Gathering follows the same remit but for a whole week residential of creating, talking, being, cooking and living together.
Melin Dolwion/ Create-ahh is a community space for recovery, creative retreat and reclaimed experience. It is based in an old woollen mill in Drefach Felindre, Carmarthenshire. More info here: http://create-ahh.org.uk/4-2/teaching-and-facilitation/
I would urge anyone seeking a creative space to get away from the city to head to the mill. Maggie is the most wonderfully warm, welcoming and inspiring host and the mill is a wonderous place in a glorious setting with a stream at the bottom of the garden and heaps of creative abandon.