Facebook – How to stop event invites from a particular group without leaving it

I have been looking at this for a few days and the nearest thing I could find to what you want is an iPhone App called EventsBook

Apple Store Link

Developers Website

It can sync Events and Birthdays with Facebook although it is not clear whether you can accept or decline event invitations.

Short of writing your own Application it doesn't look like their is anything out there at the moment. ( I may write one myself - seems like a good idea! :)

UPDATE

It seems there is a service that provides what you want - it is called http://www.mixin.com/

It allows you to collate and manage events and calendar information from lots of various sources - including Facebook.

You can view a full list of features here - they look pretty impressive.

I have just registered and you can fully manage your Facebook events using the service.

Hope this helps!

When you are creating the event, there is an option that says "Invite members of the host group to this event", but I'm not sure that it is possible to do so after the event has been created -- the option is no longer there when you go to edit the event or invite friends. I think you will have to invite the group members right from the start when creating the event, or else select them manually afterward.