A bit of personal advice? The Career Fair can be exhausting and irritating, especially for those not in STEM. However, meeting the recruiters allows HR to put a face to your resume, and you actually exist to them rather than just being a piece of paper or a PDF that they can ignore. Many companies may not have summer business co-ops available yet, but when they open in the spring, you have the advantage of having a connection within the company already.
Best of luck in your Career Fair endeavors!
Women in Business