Why would you want to do that? Luminaires are meant to illiminate the surface below where they hang. Without the table under the light, you will have some murkily lit dinner parties. Or overly lit like an operating room to make up for the light deficit between the fitures.

Well, you're right, it was just a thought. However, I've seen pictures on here of two similar chandeliers on opposite ends of a rather long table. I don't think this would be any different if done right. Even if it has never been done before.