I haven't seen a CREDIT card one (though that would be convenient for me), but my school now allows us to swipe our ID card to use our flex dollars (part of the meal plan) to pay for snacks or soda from the vending machines. I used to love this, but I unfortunately don't have a meal plan this semester.
I tend to go through cash very quickly when I carry it around, and it's a pain in the ass to get more. I would either have to use the ATM on campus (which isn't my bank, so my bank charges a fee for that and the ATM charges $2), or since I don't have a car, walk a mile to my bank or take the bus. So yeah, it's more convenient for me to use my debit card than use cash.