Unique pubs with unusual/cool decor & atmosphere?

My sister and I will be heading to London next week & are looking for some non-typical places to hang out at. We have already been to Gordons & LOVE it there. We are not looking to go dancing or clubbing, just someplace neat to have a few drinks and maybe a light bite. We would love to go somewhere with cool and unusual decor. Any ideas? Thanks!!!!! :-)