Greetings Al,
Welcome to SketchCrawl!
The following post contains information about how to participate in the SketchCrawl events.
http://www.sketchcrawl.com/forum/viewtopic.php?t=2224
In summary:
Once the date is selected by its founder
Enrico Casarosa, a forum topic for the given event is created.
http://www.sketchcrawl.com/forum/viewforum.php?f=36
The next step is to create a new topic to list your specific location using the following format:
City - State - Country
(this is so we can keep track of the locations participating via the backend)
Once that is done its just a matter of contacting members of your community to let them know a SketchCrawl event will occur in you location. Some past participants have created their own flyers which they then give to art stores and art schools.
Since you are a community media center, perhaps some PSA could be run to alert your viewers of the event you are planning, with a link to this central point, as a place to further work out the details of the event.
Afer the event we create a topic for results: City - State - Country [Results] and share what we did during the day.