Don't confuse what you see on social media with reality - people post pretty photos from cafes and clubs, but they rarely document home hangouts, even though those are probably still the majority. But there's a nuance that's easy to miss: this really is changing, but not so much because young people suddenly stopped liking home parties, but because a lot of families just don't have the conditions for it - tiny apartments, parents who aren't keen on it, stuff like that. Outside venues became more accessible thanks to fast food, cafes, and entertainment centers, which there used to be way fewer of, so it looks like a trend, but really it's just a shift in what's actually available to people.