Many undergraduate and graduate students don't have anything even remotely resembling an office that they can tutor from. However, there are lots of places where you can meet students to help them with their courses. In face, some students prefer never to tutor in their office for a variety of reasons.
Most libraries provide the perfect combination of privacy, quiet, and comfort.
There are usually several other people around so neither you nor the student is likely to feel alone and uncomfortable. At the same time, you don't have to listen to people constantly yelling, laughing, and running around. The logical choice. Try the Student Union Building. Most universities have some meeting place for students with lots of desks, tables, and plenty of people.