What I learned about this new library afterwards: it was allowed before it got too crowded and university members couldn't get workplaces anymore (they have about 1,250 places and 30,000 students). So now, you can enter the library as a non-student, rent books but you are not allowed to use the workplaces (they check at times if your student-id is laid out on the desk but they didn't when I've been there)