Lew, if you get a chance an want a good meal,

the Keys Fisheries in Marathon is great. I don't like fish generally & I would love to have a mahi mahi sandwich now.

They are on the Gulf side of 36th St I believe, may be 35th. That one is more laid back, patio type seating.
Another great meal is at the Square Grouper at the 22.5 mm. If you wanted a dressier place, this is one of the nicer type venues I guess. (It is the Keys). But they will take you in shorts & a tee shirt.

The food is great there too.
Boondocks is another fun place. I don't remember the exact name of the key that is on, but it's probably 20 miles or so from KW.
In the Big Pine area No Name Pub is a good time. If you follow the signs to No Name Key, you will see it. That is also a good place to see the Key Deer. They are cute little buggers. They are about half the size of a 'normal' deer.
Have fun & take lots of pictures for us.