I was at a German restaurant in Brisbane once, ordered the brattwurst platter. Had it before and it was really good.
Start eating and the first 2 sausages are lukewarm at best. When the waitress pops over and asks how is your meal, I mention a couple of the sausages are a bit cold, but don't stress, I will still eat it.
2 minutes later, head chef comes over to apologise in person and gives me and the person I was with a free drink each.
When I go to pay the bill, they didn't charge me for my dinner, which I then complained about because I had eaten it, but they insisted they wouldn't let me pay for it, so I bought 4 schnapps as a goodwill gesture instead.
Been back there every time I went to Brisbane.