My local library collocates with a cinema these days - I, and many others, were originally super sceptical about this, mostly because the arrangement made a public service and space sort beholden to a commercial entity.

Happily in practice it has turned out to be great, and the combined space operates really effectively as a community ‘third space’. Obviously because of the private sector aspect of this there’s a significant risk in terms of how sustainable it is, but moderated somewhat by the council owning the actual building both live in.