Just visited my local library - both adult and junior. They are both rather small and cramped.
In the adult library the section I wanted to look at was completely blocked off as a tutor and her tutees were plonked in front of it. I saw two other tutors with tutees in there as well.
In the junior library it was even worse. Both sets of tables and chairs were in use by a tutor and tutees. We we unable to look at the books we wanted to.
I did mention it to the staff and they said it concerned them but they weren't sure what to do about it, although the council's by-laws do ban commercial activities/businesses from running in the library.
Surely they can find somewhere else - failing all else there are plenty of coffee shops around and probably quieter.