Here's our experience from one US Chicago university.
Students living on campus have been encouraged to leave, but can choose to stay.
Students living off campus make their own decision.
Facilities like gyms, concert halls, etc are closed.
Not groups of more than 50 in one place.
You can get food in the dining hall, but you go in, they serve your food into a box, you take a bottle of water, and you leave to eat back in your room.
Also it's in the state of Illinois, so all restaurants and bars are closed for dining in, but take out is available.
They did switch to online exams, but they've now said that given how distressing this has all been - especially with people having to travel a long way and potentially pack up their rooms - they have made the exams optional.
They've offered for any student to switch any of their A/B/C/etc grades to pass/fail.
They will mark on students' transcripts that these subjects were taken/tested during a global pandemic, and that the grades should be interpreted accordingly.
They are looking into the possibility of refunding room and board plans.
There doesn't seem to be any talk of refunding tuition, but I'd assume they're at least considering it.
All of this only applies to undergrads so far.