SnoValley Writes! is a non-profit writing group Casz started back in 2008, which is going strong and has spawned the writing careers of dozens of writers, as well as a separate publishing organization started by one of its first members. In conjunction with this group, Casz teaches a monthly workshops, sends out weekly writing prompts (which anyone may subscribe to), and the group offers writing cafe meet-ups twice a week.
Check them out: http://www.snovalleywrites.org