Yes, if the problem is less snacking-after-dinner and more dinner-morphing-into-all-evening-grazing, I would think that giving dinner more definition would help. We normally eat at the kitchen table anyway, because I don't really like eating off my lap (too easy to end up covered in sauce, I find!), but it does mean that sofa=somewhere you go after dinner is finished.

Happy to meet up if you are - FFtMC, then?