Closings and changed hours for the July 4th holiday are unpredictable. Here's what I have been able to find out so far.
-Alterra's hours at their various cafes are summarized here.
-Stone Creek: ??? (A Stone Creek barista reads and comments here, but she may be at work already.) I believe the Shorewood location closes at 3 p.m.)
-Fiddleheads: Mequon (N. Port Washington Rd.) is closed, as I can attest: I just tried to go there.