Make a removable plywood table topper to expand your seating options. Use ¾-in. plywood, which is sturdy enough not to bend, and cut the topper no more than 2 ft. wider or longer than your original table
top, giving you a foot of extra space on each side. That should allow you to seat a couple of extra people (interior designers suggest allowing 24 in. per person around a table). Put a piece of nonslip shelf liner underneath the topper to keep it centered on the tabletop, and throw a pretty tablecloth over it to hide the plywood surface.