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Heavy surface, rustic (country) finish, steel legs blend into the rug and seem to disappear. Note the "farm simplicity" is carried through the style of the chairs.
Slab in a more Modern context. Not a true "live edge", but still follows a natural form. Polished surface and tight grain pattern also lend to the monolithic appearance of the piece. Legs are simple and clean, also clearly of a different substance than the table top, reinforcing the Modern theme.
This is a compelling image, and I think it is similar to what you have described as an overall dining environment. The table has a smooth, gestural look, contrasted by the middle seam and symmetrical butterfly tie. (Note: That butterfly is machined out of aluminum, matching the legs) The light tone of the table (possibly maple) contrasts with the dark leather chairs and the grey concrete floors.
This is a much heavier (physically and visually) piece. Darker stain and grain, along with solid slabs legs make a much more stable piece. It also appears more monolithic because of the bench seating, instead of chairs.
Interesting idea. Legs are straightforward, but clean and out to the way. The legs would also be less prominent if the chairs were more traditional.
Another heavier option. Blending Craftsman textures with a Modern simplicity. Contrasted well by the Eames chairs.
This image offers a lot of contrasting rectangular swatches of color. The table almost seems like an extrusion of the flooring, but is complemented by the wall panels and the storage case. The question to ask when selecting the slab would be, "Will this piece tie into the surrounding room, or stand apart from it?"
Another image of the aluminum leg table. From this image it appears that the table is made from 3 slabs, not just 2.
Another handsome pairing of a strong, fully articulated grain and a straightforward contemporary interior.