I would second Johnnynorman's reply. Wear a suit if you are actively seeking a job. No one will think you look silly, you're just taking the exercise seriously. We have them all the time at my school and almost everyone (except me) is wearing a suit. A word of advice though, I always see way too many guys in ill-fitting black suits (I always feel like yelling "For Shame." at them) thinking that they will land an interview right then and there. I was involved in a restructuring of my university's Career Centre and was told by several representatives from large businesses (banks, investment houses, accounting, etc.) that the main reason they come to these fairs is to make prospective applicants aware of their brand, not to hire students. The rep's are they to sell you on the company and why it is an attractive place to work. Rarely do they have a list of jobs they are actively seeking to fill with Job Expo participants. So by all means go and talk to the reps, but ensure you get the name of a manager that works on something you might want to work on. Than you can follow-up with them. Don't talk to anyone in HR. Hope this helps, and have fun. A.