Non-clinical volunteering. They are not patients, they don't have medical records at the facility, they don't have doctor's orders for this activity (whereas folks in a rehab facility or hospital have doctor's orders to get out of bed, participate in activities, eat a specific type of diet, etc).
Is babysitting "clinical" if the child has a chronic condition or is developmentally disabled? Is coaching baseball "clinical" if one of the players has asthma or diabetes?
That said, non-clinical volunteering with people who are unable to help themselves, is a good use of your time.