Public Library using multi-site for static web sites. Interested in how they could use BuddyPress.

Small public library currently using multi-site for static departmental web sites. Interested in how we could use BuddyPress to build a local library community. I haven't been able to find any examples of a public library using BP but it intrigues me with the possibilities. Should we start internally with staff running interest pages? Is there a way to keep the static pages for now and work BuddyPress on the side?