If you don’t use the door then center the table

Notepad, I thought you explained it pretty well. I don't think you need anything more than your table and buffet. As for space, take a roll of painter's tape, tape off the dimensions of the table, allowing about 3- 4 feet around the perimeter for the chairs, then see if there would be room for a buffet, and if so, where would it best fit.

I think the space would open up if you removed the wainscot. It is creating a "box" that stops the eye and says, "That's all, folks!" I agree with Suki Kabuki that the ladder shelves must go. They always remind me of college decor, along with milk crate shelves. Consider putting the TV on the wall where the ladder shelves are, floating the sofa facing it and moving the dining table near the window where you now have the TV area. I think you should eliminate one of rugs and only use one at the sofa. The two side tables by the TV are cluttering, but you might use the taller one by a sofa arm if it arrives within and inch of it, up or down. Get yourself sorted out with these issues and post new photos. We can go from there.

Your note to me said the “pedestals” are coral…as in real deal coral? Just trying to work with the pieces for you, as the pairing of the chairs and the coral shape are at odds. .Let’s say you used a fabric like this and painted the chairs either black or white, in a high gloss finish. Okay, not a bad combo, but the problem is now the chairs and table do not go in your dining room…everything would have to change…wall color, wall decor (not a huge problem there) and chandelier and a rug. Would the dining room then work with the rest of the house? IMO, the chairs are great…solid, quality and you can still paint them for your room. You can even keep the glass top, but the coral would have to go. It could be replaced with Chippendale base, in the style of this rattan one: eBay for $99.00! Ignore this one below…I can’t cut it out of post.