Six diners at the DK Oyster Restaurant on Mykonos recently received this bill.
Calamari, six beers, three salads, and a Tomato juice cost €836.20 which, apparently, they reluctantly paid.
Many years ago, my oldest was in a café in St Tropez where he received an outrageous bill for a small beer. He called the waiter over, ordered another, and as soon as his back was turned he ran for the hills. Personally I think what he did was quite right. To charge a student something like €20 for a beer was crazy (he was still in Oxford at the time), and the café's owner deserved not to be paid.
So what would you do in a similar circumstance? Pay-up, or simply walk out leaving what you think the meal was worth.
If it was here in France (a reasonably inexpensive country for eating out), I would estimate the bill at around €30 per person; making a total (including tip) of about €200. I would have put that on the table, and walked out.
€836.20 is taking the piss!