Materials Needed:
9 Piston
9 Redstone Torch
4 Wood Stairs
1 Cake (optional)
This is for a 3×3 kitchen table, you can adjust the materials accordingly. Select the space where you want your table and dig all the spaces two blocks down. Place the redsone torches in these 9 spots and then levers above these torches. Now place the 4 staircases at each end, representing chairs. You can also put signposts on each chair if you like as well (explained in the basic chair section), but it looks a bit worse when right beside a table. The cake is for decoration, but leaving it off or using a different food could be used if desired.