If You Have Ever Volunteered at a Rehab Center What Kind of Things Did You Do?

Or even if you haven’t can you tell me what kind of stuff they have you do when you volunteer at a rehabilitation center for drugs or alcohol?
Well i managed to look up information and they do have people who volunteer if you are qualified. You have to apply like you would for a regular job. They do things like teaching arts and crafts classes. There was a list but I’d have to dig it out. Thanks for your help though it is much appreciated.