I'm not out there dating... but if i was...
I'd leave my cell in car before entering dinner. Tell her you want to focus upon her, and her alone.
She'll HAVE to do the same. She might try some BS about "oh, I gotta answer in case my kid calls..."
But if you and her can BOTH leave your cells in the car, the hour of chitchat will be great, and willingness to drink will be might higher