I live in Slovakia and in certain parts this is a very common thing - if you’re about to have a birthday/wedding/any other gathering, you book a restaurant or some bigger place, you agree on what meal they should prepare for you and they prepare tables. The waitresses are there for you as usual.
But when it comes to alcohol and drinks in general, the restaurant doesn’t serve it, you bring your own and also serve it.
I always found it weird that we bring our own alcohol to a restaurant even though the restaurant offers alcohol aswell.
Is this common in your country also? Do you bring other things for a party/gathering in a restaurant?
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.