I like a dining chair with solid seat and back since often the people are in shorts and tops so a nice solid back is more comfy IMO. I would like to see some color on that deck so maybe a more colorful rug and then a color from that for the dining chairs .and accents . I of course have no idea about your style inside but does your DR furniture match your LR I think of the outdoor stuff as an extension of the interior so often the same colors but a bit more intense outdoors . A prtty blue unbrella for instance with a rug like this
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coffee table
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