First: 3 oz. of ice cream is absolutely guilt-free.
Second: It's free. (Make your donation, of course, but still. . . free.)
Third: It's free Cold Stone. Yum!
(I know that I phrase my arguments in "First, Second, Third" or "A, B, C" organization WAY too often because I now hear my little Mimi telling her sister things like, "A: You have to give me back my Barbie. B: I'm going to go tell Mom." She doesn't quite have the concept perfectly clear, but obviously, she's heard it before.)