Before getting tied up with bureaucratic nonsense my daughter was looking at starting a "borrow a grandma / grandpa" club at her university. The idea was to connect students with elderly people who are lonely, and they could have tea / coffee together. The elderly get to be social with a younger generation, and the younger generation gets to understand the struggles that a lot of elderly people face.
I think that the university was concerned with liability. I still think that it's a good idea.