When I am out in larger groups, the number of drinks varies little with what was ordered, be it beer, alcohol-free beer or other beverages. This is one medium to large sized glass of beverage for a lunch and several in the evening. Coke might be an exception, but it is very rare, that someone orders coke in a restaurant. Usually you have fruit juices of many variations, often as a "Schorle", that is fruit juice mixed with sparkling water. Or just water. And the prices differ only little between a glass of beer and of juice.