Hmmm, that is a challenge. I'm a big fan of triptychs, for some reason - maybe you need to step back from fitting it all in one image, get a suitable third image, and make it a set. I'm imagining, for instance, the middle picture being the exterior of the store (maybe cropped in a little tighter to lose a bit of the clutter) and two views of the interior on either side. Be nice if you could get the lobstermen standing around the stove, too. Probably not at all what you had in mind, but you asked for ideas!
I hope it helps trigger something useful for you.
Julie