[arghIdontwantto]

I'm portuguese, so don't take this as a jab, but cafes are also notorious for tax evading, specially on the single coffee or 2 beers kind of bills.

I have two very good friends that own cafes here (which seem to work similar to what you are describing) and he hates when someone uses a table for hours on end and ends up paying one euro or something, even groups. He always told me that his best customers are the ones that come in, have their coffee, pay the euro, don't care about receipt and leave after 10 minutes. Those are the ones that keep him in business (and yes, tax on a 1 euro coffee isn't much, but multiply by easily 500 a day, and it starts to add up)