Even if you said, "plywood tables," no one would expect this. From the website:
Lazarian, "Richard Sweeney and Liam Hopkins, created a series of models with various connecting methods, including bolting and self-interlock. With the use of a CNC (computer numerically controlled) router, these models were further advanced to find structural forms capable of supporting weight. From this process emerged a distinctive collection of furniture, which makes use of both raw and laminated birch plywood."
There are three tables designs in the Mensa Collection, all with the unique interlocking bases. Click through to their website to see more tables from this collection.