A tipster sends word that the Park Slope Subway chain is open on Seventh Avenue, with a note: “A sad day for Park Slope.” This Subway moved in after Leaf & Bean had trouble keeping up with the rent.

If you're lucky enough to be invited to a cookout on July 4, you might not be too worried about what you're going to eat today. But if you're on your own, you might be wondering what's open and what's ...