What an inspired idea!  
Anne could you host if we moved it back to the original Saturday date? I think it would be so much better to have a lived in living room, particularly your lived-in living room.  
Could Sander set up another one of those RVSP thingies post haste to see if people can still come on a Saturday? With a final decision being made at midnight so we can all get up on Saturday morning to find out where we are going.
Nothing like last minute pressure to get people bonding together :-)  Is it too late?  Or 
Can we do this?  Yes we can!