For my kinda liking Rumpus is the best party that London has to offer.
Like a mini festival it offers absolute nutterness for anyone who doesnt take life or themselves too serious. Just dive into the rabbit-hole for one night and see what happens until you get out of it again.
4 or 5 rooms - with different themes filled the most incredible bunch of people and with tunes covering all genres except shit. If you wanna dress up - do. If not - no one cares. Get involved and have fun!

Their motto is Rumpus - The Way parties should be. I totally concur.

Check out http://rumpusparty.co.uk/ to find out when the next one is due!

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