It is not official therapy work, but you could take your dog to visit a nursing home. At the nursing home where I work, the only true requirement is that the dog's rabies vax records be on file with the health clinic. The dog is, of course, expected to be well-behaved, always leashed, comfortable around wheelchairs, cleaned up after, etc. But, the only requirement to visit is the vax record. And, the residents absolutely love it.