There was a problem, but at last it's fixed! You can now leave comments on any event of the events calendar in the same manner that you can leave comments on most other articles of the website.
Because the comments are listed on the same page as the event (meet) listing itself, we might think about using the comment system for meet organisation, instead of this forum. It would have the advantage that the organisational details, changes and discussion would be right with the original event listing.
What do you think about the possibility of using comments on the events calendar listings, instead of the forum for meet organisation?