G. Mark’s Answer
The first thing you want to encourage is for EVERYONE to support each other. Because creative writing is baring your soul to others. Make sense? It's not about perfect grammar or fantastic organization or maintaining a "proper style". It's about sharing what you want to communicate, and sometimes that will be very personal and very embarrassing. Anyone that violates this rule should be informed strongly. THEN you work on style and grammar and all that stuff. The idea is to have something worth sharing. And sometimes that stuff isn't ready for "prime time", as it were. Make the members feel as though they can just "chat" via their work. If I read something that's been run through the "marketable writing" mill, I don't want to bother. I can predict the ending and don't need to waste the time. There are lots of places to learn structure and the mechanics. Heck, there are programs today that can actually generate stories and screenplays. But who cares if it doesn't tell you something new about a person or situation or the world? So that's what I'd recommend. In Market Speak, that would be a "game changer" or "product differentiator".