Sorry, there is no such thing as a treat up but if you find one please let us know. There are alternatives to hosting outside events and activities that interests groups might create around your event. Perhaps you can plan one too.
What is a Meetup?
A Meetup is a great place to find others who share a similar interest, hobby, or activity to participate together as a group. You can plan a Meetup around your next event
What is a Tweetup?
What is a Plancast?