I highly recommend Sugar’s Ribs for a food stop, get the brisket tacos and fried okra!
FYI: In TN, the "no gun signs" must meet certain standards in order to be enforceable.
The TN Aquarium has those correct standards signs posted on the doors.
Apparently this is a recent development - as a group I belong to on FB had members saying that their recent visits didn't have signage.
Anyhow - Ruby Falls and Rock City were NOT posted, or most certainly not posted conspicuously.
All in all, I HIGHLY recommend the Chattanooga area for a get-away.