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A circle table with a 5 to 6-foot diameter would be perfect. That way any number of people can sit around it and not be too far fromthe board. The board itself is about 2.5 feet all set up, so that leaves about 2+ feet around the edges for people to put their cards/pieces.
Something like this could work, but I'd obviously look for it at an actual store. No folding table is worth $384.