There is also a Blueskies night on the Friday night in a pub in London Bridge (see posting in Forums somwhere, sorry dont know how to do a link), which whilst being a pub night rather than a 'do' has some good DJ's on and should be a good oppertunity to relax with friends and listen to good music.
Thanks to Bearsy for the mention of our night in Walthamstow - guest DJ this month is well known collector and DJ Tony Smith.
If you like your tunes on the modern side, Monumental wont let you down either and is very central and easy to get to.
Cheers,
Dave