The waiting room at the Mosaic Comprehensive Care Clinic in Chapel Hill, N.C., is as generic as any doctor's office except for a framed sign by the door. “No Wrong Way to Have a Body,” it says, above an illustration of different cacti species. The second anomaly of this primary care practice is what is missing from the exam rooms: there are no scales. Louise Metz, the clinic's owner and founder, keeps just one on the premises, tucked in a back hallway. Most patients never even know it is there.