There's many MBA / Grad program sponsored events on campuses, usually run by students. By asking the student via email / twitter / groups if they would like you to sponsor the next event or even partnering up with that student organization and creating an interesting talk about something that could be relevant to them. They may be open to it.
Our app is targeting students (non grad and grad) and this is our approach, we've been able to schedule some focus groups as well as connecting with the student organizers that run these events. We're working with an organization and plan to do a session with them in the next few months.
You can start this process by either cold email or you can actually attend some of these events and approach them after the panel / event / presentation.