Great minds think alike ;)  In fact, I'm experimenting with depth of field on my previous render.  I'm using 50mm and an f-stop of 22 on it (because the 2 characters are about 200" apart) on it and it's looking good so far.   I'll probably post it as a "redux" to show how it adds to the image.

The downside is that this is really kicking up render time.  I had to crank up pixel sampling to 15 to keep the out-of-focus parts from looking grainy.  Still, bB, I think it'll be a way to hide the rows.