Share 'promoting the value of improvisation to promote wellness in a public mental health setting'

I am working on a proposal to create therapuetic improv workshops in public mental health centers to promote wellness and recovery. Any advice on how to win over an administration on this idea? Any witty examples or quotes? I am being asked to provide research on the benefits of improv. Given the lack of this, I am looking at humor research. But, I think I'd better with a powerful story. What ...