Not a chance in hell.
I do everything I can to be non-obtrusive, setting my phone to silent, not making calls at dinner, only accepting calls from people I know are likely to have important messages... but there is no way in hell I am cutting myself off from the world, or the world off from me in absolute for an hour or more. I've had too many situations where I NEED that phone, including medical emergencies and family disasters (read: car wreck).
Its on my hip every waking hour; no chance in hell its coming off during dinner.
And the own can keep his %5 discount.