No
If I was in Harry's position I would've only said hello to Brian, which is the only person she did greet.
And just for the record I'm so over these people implying that she's feeling sorry for herself and looking bad for not wanting to go over and 'mingle' with the rest of them.
Do people not know how real life interactions work? She'd just been humiliated and torn apart by most of them and people still expect her to make effort.