Maybe times are different. But, when I was in college, as a commuter, I often had to hang around and do work at school, and often, in groups with others. We used the library, and dedicated study rooms in the student center. It was never a food fest, though we might have had bagged lunches, but it was very contained. Though, I am sure those rooms had residue, I would not think any worse than a restaurant table, like a pizza place.
Is the current trend to all bring food to share and munch while they work? Maybe so. Also, one big change, i am sure is the prevalence of nust, granolas, nutty bars, etc... We are only 4 years away from living this so, I am asking to gain awareness.
Trying to offer to bring the snack sounds like a good idea, if your dd can easily get it without much time wasted. Having to do it all the time could be time consuming. I would hope, as they get to know people, that others would be supportive.
Maybe Nameless can weigh in here. She works on a college campus and has allergies.