Looking for a relaxed and social flat share

I’m moving to London from Sydney (but from Melbourne originally) in late June and looking for a flat share. I work in sustainability for a medical device company but outside of work I like running, swimming, pilates, having a few wines, going out etc. I’ve worked in London intermittently for the last few years, so love the area and have quite a few friends around. I’d love to find a flat that’s relatively social and up for a house dinner/trip to the pub but where we can all do our own thing as well.