Well, I hadn't been intending to make this a definite suggestion, just day-dreaming, but if may, I certainly don't think it's impossible, at least, not all of it.
I grant you that for such an event to happen in reality it would have to be smaller and more local, catering to specific areas. Where the etiquette is concerned, it's simple. The point would not be t have a reproduction of period behaviour but instead to take the principles which govern good, godly, honourable and respectful behaviour and apply them both generally and specifically in a modern fashion. That is, CAA could come up with it's own etiquette, it's own form of conduct. With a resource such as CAA, it would be possible to find out those who would be attending by RSVP, and then to create an etiquette for the evening. Saying not only what will and wont be expected, but also some specifics for the evening - the way people should address one another, perhaps certain appropriate gestures, and phrases. You could have som fun with it, and by stating it in advance everyone would have a chance to chime in, and get themselves 'into character'. The matter of manners and etiquette is not to make a show of elaborate historical behaviour, (certainly not showing-off) but instead to consider others before oneself, to show the utmost respect, for men to treat all women as ladies, in purity and respect as sisters and as daughters of the King, and women to treat men as 'sirs', sons and knights fo the King, with respect and modesty.
Where escorts are concerned, that of course presents some difficulties, but if parties are willing, perhaps the best way to approach it is, after RSVPing, communicating between the parties, and then arranging for all the ladies and gentlemen to meet at the event, perhaps with a formal ceremony where partners could introduce themselves to one another and present themselves to the crowd. If it was all kept within the event I think that would minimise and fears and risks.
All of this would be optional, up to the planners, of course. As would be the dancing. Although should it be desired, I don't see why it couldn't be possible to have one or two set dances, where by everyone could be taught a simple dance, and all could participate in the coordinated event.
Informal is easier for a lot of people. If the CAA event was made a weekend, then it could begin with the Ball or end with it, and other activities arranged for the rest of the weekend. Perhaps if it was done in a hotel, everyone could gather throughout one day, then perhaps some kind of informal gathering to make introduction and break the ice. Then throughout the time there could be screenings of things, trips outside, different activities, to get together, leanr about one another, enjoy some anime and manga, and perhaps culminating in the grand ball; at which point everyone would be a little bit more familiar and comfortable with one another.
Still, it's all just ideas. Just wanted show that anything is possible should we have the desire for it. All this conjecture is fun as it is!
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