In reply to 999thAndy:
Response to your questions.....
Not to my knowledge, hopefully no.
Nope, no tie or gown required
i'm happy to dance, but depends if there is room
yes, always (my girlfriend says this is tarty though, and she doesn't endorse it)
i have paid, but if it would be more trendy to gate-crash, i'm happy to pretend i haven't, just to be cool