cruisegary, people here are being informed of their options on Amtrak not the local restaurant. The options include no tip (perfectly okay as officially not required by Amtrak just like the airlines) or tip ( perfectly fine, amount up to you).
That is a 100% free choice of the rider and should be understandable to most people .
That is a 100% free choice of the rider and should be understandable to most people .