Good idea. How about £1 for every beverage imbibed. This will encourage safe and responsible drinking amongst forumites and potentially avoid embarassing loss of inhibitions.
Possibly. We might get more takers closer to the time.
Last year, Twister Ken did a great job of organising a Macmillan Nurses coffee morning collection (even though we were all spread out around La Manche), prompted by another forumite.