Do you think cost might be a factor? The economy isn't great right now. Prices are high. Alcohol is an unnecessary expense that people can cut out to save money (and it's more expensive at bars and restaurants where people can escape their homes to).
You could create a home party with really good cocktails for sub 100EUR total cost. And home parties are actually the best ways to socialize and meet new people.
Clear Ice DIY - free.
1 lt prebatched Negroni - 15EUR
1 lt prebatched Old fashioned - probably around 20
1 lt Mohito/Smash families - again around 15-20
1-2 bottles of not terrible prosecco - 10EUR each (good thing about Europe - a lot of the PDO wine products are acceptable quality and quite cheap)
Syrups - if you use essential oils for flavoring - you could get down to 2 for liter of cordial concentrate.
By using some tricks you can stretch a couple of citruses to make a lot of juice.
If you home carbonate your water - it is penny on the liter - so you can spritz the cocktails to make them lighter.
You can legitimately get 15 people quite tipsy for 5-6 euro per person.
Booze in USA is not terribly more expensive - and some stuff is even cheaper so I guess a chatgpt created bar program for home drinking could get into this budget too.
