Dear Christina, as you said you just wanted to have a drink that is why the waitress told you that you can have a sit at the bar area where we serve drinks. At the restaurant area we serve food. Also we would like to point out that the "bar" is not on the street but the Bellini has a terrace in the main square with lake view. And It is where people go when they don't wish to eat à la carte in the main restaurant.
It is also import to notice that is not that because of the Corona you are allowed to fo whatever you want to, we do have and also guests have to follow rules and it is appreciated that everybody cooperates.