Sorry, Arbitrageur. I was just trying to say that we can shift the date a little if there is somebody who definitely wants to come but unable to make it on a particular date. It looks like only a few people willing to come. Then why not move the date for the sake of one more person? It is just my way of expressing thought at times - english is not my native...
About the dates you suggested, Friday is probably not suitable for wasp from Brighton (but Ok with me), and Saturdays are not quite good for me.
Anyway, who's going to come eventually? And what do others think about date/time/venue?