Ethnography Proposal

I am torn between two subgroups.  The first is the Weight Watchers group.  I would go sit in on a Weight Watchers meeting.  I have done Weight Watchers in the past, and I understand what they are going through.
The other group I am considering is the Gastric Bi-pass group.  I could go to one of the meetings held at the hospital.  They have two different kinds of meetings one is before the surgery, and the other is the support group meeting after the surgery.  I have also gone to these meetings before, because I have gone through the surgery.  Both groups are very much about food, and the relationship that we have with food.