How prevalent alcohol culture is in the West. I'm Southeast Asian and it's more common for us to drink sugary drinks and have food at the local corner restaurant at night instead of having alcohol when we spend time with friends.
When I studied in the West, it really struck me how the only place you really could hang out at night was the bar, and alcohol was often the preferred drink. And they normally closed at 12am, so you can't even stay out that late.
Personally I'm not very fond of inebriation just due to the issues it creates (not that my friends were alcoholics and got blackout drunk every time we hung out), so I found it kind of bad that it's so socially accepted to see a need to get drunk in order to tolerate socialising with friends.
as someone from Berlin, it's wild that you even have a "last call" rule in so many places/countries. Bars and clubs here can just decide themselves, when they want to close. There are even a few 24/7 places.
I'm not much of a drinker myself but. Some people use alcohol because it makes them "open up" and it's easier for them to have fun that way. (this is what the finnish song "cha cha cha" is about.)
Plenty of people in the West find the alcohol culture frustrating, especially recovering alcoholics. Personally I can't drink much, so I tend to find myself sipping on a cranberry juice.