Ask Europe

Never seen that here in Austria. You would probably get kicked out if they saw you bring your own drinks.

I've never heard of any restaurant in The Netherlands that would allow you to do that.

Unheard from in France and Belgium

Never seen that here in Germany. Especially considering drinks are usually what the restaurant is making the majority of profit from.

The only place where we do bring something ourself are "Biergärten" (beer gardens) where you can bring your own food, but buy drinks (unsurprisingly mostly beer). Although they also sell some food and often have a section that is more like a normal restaurant where you order both.

Definitely not happening in Italy.

I saw it in UK in places where they had no license to sell alcohol

No, you just get the alcohol from the restaurant in Spain - I'd think they would get quite mad at you if you were to bring up a wine bottle to the table.

Never saw that in Europe (but I never been to Slovakia), it's quite common in Australia though, where restaurants without an alcohol license use the BYO acronym, meaning bring your own. Sometimes they might apply a "cork fee" though, so you bring your own alcohol but the restaurant provides the glasses, the waiter might serve it I think, and then there's a cork fee in the bill.