I would consider at notice at the top of the boxes on the main page saying "Online" or "Online/In-Store" with the city listed, for example:
(SBD only, Online/In-Store)
Tim Cliff's Cliff Diving
100 Murder Lane,
Englewood Cliffs, NJ
(STEEM/SBD In-Store)
Acidyo Head Shop
666 Deadhead Way,
Knawbone, KY
You get the idea. Thank you for another useful resource. :)
Interesting idea, thanks!