Yes but the up-charge on wine is absolutely obscene and can frequently be more than what they earn on the food. Additionally, the places that can get away with this are the kind of places where arguing about what would be a relatively small charge on the bill would be so incredibly awkward that you wouldn’t dare.

So it’s extortion basically, but fancy.

Here's a non-wine related thing often charged by restaurants: a cake-cutting fee. The restaurant offers desserts which you won't be buying, and yet they are supplying you with plates and forks, and they will keep your cake safe in the kitchen until dessert, bring it out to be admired with maybe candles and a song, or a toast to the happy couple, then they'll cut and plate and pass the slices, and afterwards they'll wash the dishes. So they charge a fee to pay for the people and supplies.

We had a birthday party at a sushi train restaurant and brought a rainbow cake. We'd agreed to pay $20 or something over the total of all the sushi everyone ate. They turned down the lights and sent out the cake as individual slices on individual plates each with a lit candle flickering on it, and the teenagers loved it, which is pretty hard to do because teenagers.

If there was no charge then everyone would bring their own, and they would have to start charging more for the food to make up for the loss.