Anyone using Groups just for organizational purposes? (Students complete assignments individually)

Community Novice

I would like to use groups for organizing the structure of the class. Students inside each group would complete work independently and individually. So, for example, Week 1: Each person in the Blue Group submits a short story. Each person in the Red Group provides a couple peer reviews on the stories of their choice.

Week 2: The Red Group submits a story. The Blue Group provides peer reviews.

I do not need either group to have a "group page" or "group identity." I can't figure out how to get this to work. I could just hold a class-wide workshop, but that would defeat the purpose of small workshops. Thanks for any help.