The next one isn't arranged yet.
Shame you missed the one on 25th May - that was the first one I went to, and I had a blast (
) - met loads of fab MNers!
There was another one a couple of weeks back, which was quite close to where I live - I should have gone, but had to bail out at the last minute 
I suspect the next one will be just before Christmas, although there might be a late Autumn one.
Having said that, there's nothing to stop any one of us trying to organise the next one [I am a wuss emoticon!]