To be shouted at in front of a full terrace that if they could they would kick you to the other side of the square, told that you won't get served and that you should go elsewhere is bad. To do this to an 84 year old lady who only asked to amend an order is disgusting. The service in this place is absolutely appauling.
Halle is a lovely town with many nice restaurants, so my advice would be to steer clear from this one!
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