What if there were no demigods? They were normal and went to a boring school called The Goode Academy. It was year round.
Annabeth and Percy still have there friends and it's just high school right? No.
Percy, you know I love you, and I'm no child of Athena or anything, but did you seriously expect to know any of the people you'd be rooming with?
All I can imagine is nico being like: There is No escaping death, BUT I JUST BOUGHT JFK AIRPORT!