What in Stockholm is known as Afterwork, when you go out for a drink with your colleagues, after work, but its done by teenagers that are of legal age(18) to drink at bars.
School in Sweden does not usually offer after school detention. The punishment for skipping an important lecture or a class is simply the fact that a student missed an opportunity to learn.
"I'm so sorry dude I'm going to Afterschool."
"Aw crap, I'm only 17."
"Aight, see you tomorrow."
^Typical teenage conversation about Afterschool in Sweden between two schoolmates.