If your room is irregular, go with a shape that's not symmetric. You could do something like this where they seem connected:

Please post a few pictures of your room.

This is the type of look I'm going for.  I now have a round coffee table in black with a metal rod base.

I don't know what the proportions should be for the tables in relation to one another to pull off something like in the photo.   I could try to find similar pieces, but I would love some guidelines so I can be original.