Say “guide dog” with an Australian accent... it sounds a lot like “gay dog”.
LOL
The accent was the first thing I thought of, too!
Still, it was a bit preposterous for the restaurant people to do this. And anyway, aren’t they Aussies too? Actually, I just noticed that it was a Thai restaurant, so maybe they weren’t Aussies after all.
Could be, could be. But, I think there were other clues, too....

A written apology?!? WTF! Is this the elementary school teacher court? Is the minister of apologies going to decide if the apology is sincere enough?