If he happens to see this thread then I have a message for him.
You don’t “pass”. Every woman in the event will clock you for a male within seconds. You are a man, women are hardwired to spot men. These are the things that give it away instantly
your height
your body proportions ( shoulders to hips, arm and leg length, torso,neck)
your Adams apple
your voice
your hands
your feet
your jaw size
the way you move
your hair (head, chin, arms, legs)
And then there are these:
your cock and balls
your male entitlement
the fact that you don’t understand women , or speak like a woman
your clothing choices
I hope the event is horrendously expensive and that they throw you out without a refund.