In a column in the (Massachusetts) Republican, LaWanda Banks had some suggestions for writing groups:
"In my group, we don't explain anything. We just read what we have written. That's the best way to learn how your work is perceived.
Rule 1: Let the writing speak for itself!
Rule 2: Don't defend your work. If someone offers a critique, and you disagree, don't make the change but don't tell us what you were thinking or argue why you wrote it as you did. This not only takes up too much time, but it's a sure way to get group members in the habit of not bothering to critique your work in the future.
Rule 3: Offer a helpful critique to others. As soon as a member of your group begins to read, reach for your pencil and jot down notes about the work. Did you like the beginning line? Did it catch your attention? Why? Why not? Is the piece well organized? Does it flow smoothly or is it awkward? Is there a line that doesn't seem to fit? Was it interesting? Where did you lose interest? Was it believable? Did it end well? With these notes, you will be able to offer a good critique.
If you can't find an existing writing group close to home, start your own."