I'm actually quite excited because I've never played the Windmill apart from one time where I was horribly ill with a cold and drumming in a band I'd only just joined.

You can get tickets from We Got Tickets:
http://www.wegottickets.com/event/22597

Why wouldn't you want to come? From WeGotTickets:

LONDON BRIXTON WINDMILL
SUN 21ST OCT, 2007 8pm

BEARCUB (Camberwell/Peterborough)
Back on the prowl again after a session at the End of the Road Festival, Bearcub, a five-piece instrumental unit, pump out a fine variety of instrumental joy. There really is a bit of everything in here, well a bit of everything that's good from the lo-fi tradition of Pavement and Yo La Tengo to the noise build-up of Mogwai and the kajesty and pop of Arcade Fire.
www.myspace.com/bearcubden

CODES IN THE CLOUDS (Dartford)
Experimental, instrumental, cinematic post rock music with an album out this month on Erased Tapes - a label that knows a thing or three about that style of music. These guys are going to explode!
'Distant Street Lights screams the word 'Ambition!' with every subtly-crafted chord. Fractures is possibly the most gripping piece of music you'll hear this year, almost like the final chapter from a Jack Arnott novel. Single of the Week
– Drowned In Sound
www.myspace.com/codesintheclouds

POCUS WHITEFACE
Angular post-punk tunes that are catchy as f**k. Think Sonic Youth covering Buzzcocks and you'll have some idea of their oddpop playfulness.
www.myspace.com/pocuswhiteface

Cheers