Dear Brits: Some Help, Please

Feel free to tell me which clubs NOT to consider, by the way; I know how hard it is to book a tour without knowing the scene's context - this is how all those European bands come to NYC and end up playing the Bitter End and CB's Gallery.

You could try:
The Windmill, in Brixton, a pub that specializes in live music of all sorts.
The Borderline, in soho, a place that looks like a country-western lodge, but actually has a pretty wide booking policy; I saw the Wrens there last fall.
Union Chapel, in Islington. It's, well, a chapel, that also puts on (very often indie) gigs. Great space. They're reopening for gigs in May.
Cargo, in Shoreditch, a cool bar and space, with live music--usually dance-oriented, but with some varied exceptions.

Hope this helps!

The best place in London to play, without a doubt, is The Luminaire. No, really, they've just won an award for it. Great venue, run by lovely people.

(Ditto the Windmill, which is my local.)

Dammit, that's http://www.theluminaire.co.uk

Thanks gooblar, thanks Kate. Shows how hard it is to research a scene without living in it: I haven't heard of a single club you mention except Cargo!