An Event - is something organised by a CDG member for the rest of the group to participate in.
It's up to you to make an event whatever you want it to be.
Usually not everyone is able to attend all events - some people are not always available at weekends or during the day - it depends on people's diaries and the amount of notice given.
It can be something as loose as emailing everyone to say you'll be drawing at a certain location on a certain date & time - this is not a one off thing - it should mean that you will be working at a location you are interested in for some weeks at least.  
There are certain city pubs like Dempsey's, Weatherspoons Prince Of Wales, where we've met in the past for drawing and general get togethers - if you know a particularly good  pub or cafe -  email a time and date to everyone.
It can be an invite to your studio space, to which you can limit numbers if you need to.
It can be an invite to participate in a 'workshop' - discussion etc at your home on a subject you are interested in - again numbers can be limited as you need.
It can be a 'Show & Tell' evening - usually at a larger venue - where members are invited to bring along a drawing, their own or somebody else's, and to talk about what interests them about it for 5 minutes or so.
We don't have  photographs of many of our past events - so any future records would be handy.