In the 60s they had pressurize tubes running to your table with the food. But the person putting it into the tube had to know what table your were sitting at. 70s came around and the process of just yelling out the person’s name to come up and get it was found to be more efficient. Don’t see how this could be more cost efficient than that - unless it is at a fancy restaurant. Then there are other jobs that the waiter does beside transporting food.
In the 60s they had pressurize tubes running to your table with the food. But the person putting it into the tube had to know what table your were sitting at. 70s came around and the process of just yelling out the person’s name to come up and get it was found to be more efficient. Don’t see how this could be more cost efficient than that - unless it is at a fancy restaurant. Then there are other jobs that the waiter does beside transporting food.