Athena probably had to be tricked/bribed/guilted into going to the parties at first but after a couple, I think she started to enjoy herself and now goes without complaint. She may be smart but she's not the most social of creatures - and when she is, she's fairly awkward with it. (Think Asperger Syndrome but not quite that level.) Toss her at the college deans and she's good. :D
Though, in truth, she's also nooooot really a big fan of children. She'd definitely rather help raise money for them than actually raise one herself. xD
Athena likes Artemis! She's one of the siblings that she actually gets along with. :D So, Athena probably is cool with Leto in an enemy or my enemy is my friend sort of way because while she hates Hera, she adores Zeus.