A growing body of research has found that singing with other people has a positive impact on the health and wellbeing of participants whilst also being a great way to meet and bond with other people, thereby reducing loneliness and isolation, particularly in older people.
You may be interested in these active petitions
https://www.canterbury.ac.uk/health-and-wellbeing/sidney-de-haan-research-centre/documents/singing-for-mental-health-report-dec-2015.pdf
http://rsos.royalsocietypublishing.org/content/2/10/150221
https://www.ncbi.nlm.nih.gov/pubmed/11811096?access_num=11811096&link_type=MED&dopt=Abstract
http://journals.sagepub.com/doi/abs/10.1177/1321103X13478862