[Europa]

I was in the same situation as you last year. I volunteered in shifts to be a student ambassador. Student Ambassadors give tours to groups and VIPs. I mostly gave tours to school groups. I got to meet a lot of new people from other teams and go watch matches from floor of the arena with the tour groups. This also leaves you a lot of time to see everything else that you want at the competition. I would recommend going to the MIT presentation and seeing the City museum while in Saint Louis!