Are there any good music practice rooms in central London?

Would be good if there were any free ones, but most likely any where you have to pay a subsciption and can practice an unlimited amount of time. Perhaps a music club somewhere?

Abbey Roads's alright...
done some people a few favours in the past

moreley college in southwar charges 拢5.00 per day

also check fazioli website,they list practise rooms in london