Italian bars in the centre of major cities charge more if you drink or eat seated at a table outside rather than standing at the bar or taking your order to go.
This is because bars are charged a very high tax to place tables and chair outside, so since most people do not use tables anyway,. The further away you are from the center streets, the less this rule is applied.
When calling into a bar for a coffee or other drink you first go to the cash register and pay for what you want.