I think any public eatery even as far down the scale a Bking or McDs it's just the rudest thing you can do is talk on the phone for any reason. I too need mine for business a call can range anywhere for $60 to $3,000 depending on what the deal is, I tow and there are times I get a vehicle that has to be removed from somewhere and I remove it. I then turn around and sell it for a couple grand. I still show enough class to leave the dining area to answer and talk on my cell.The ring would not have been audible , would have been on vibrate too.