And there lots of additional issues from the potential huge boob girls' side as well. Remember the earlier comments about the point of transition between huge boobs being part of the entertainment industry versus becoming part of the sex industry ? Well, that situation is going to smack any event organizer squarely in the face. If someone were to try to organize an event with just 'single X' girls, it would probably be financially feasible from the organizer's and girls' standpoint, but there are so few 'single X' girls still actively involved in the business that I suspect the organizers would have great difficulty being able to 'sell' the event to customers on the basis of only 3 or 4 or 5 girls in attendance.
In order to create some serious 'draw', the organizers would need to approach additional huge boobs girls who also do XXX/escorting/"private sessions". Even for a short event like a single weekend, this would require that girls who would normally be escorting or doing 'private sessions' attend the event instead. Given the fact that these girls would potentially lose 3 days worth of income ... and even a conservative four "private sessions" per day @ $750 each * 3 days = $ 9,000 in lost income, the only way they would willingly attend is if the event organizer agreed to pay them for their lost income, or if the event organizer allowed them to also do escorting/"private sessions" at the event.
In the first case, in order to break even, the event organizer would have to raise the customer ticket price by an extra $900 for every XXX/escorting/"private sessions" girl in attendance (assuming a 10:1 customer to girl ratio) in order pay these girls enough to convince them to attend the event. With even 5 XXX/escort/"private session" girls involved, this would result in say a weekend event ticket price of $5,000+ per customer, which will be extremely difficult to sell.
In the latter case, a widely publicized event at which escorting services and "private sessions" are known to be available would present a large risk of a bust, exposing not only the XXX girls but also the single X girls and the event organizer and possibly customers as well to potential criminal charges. To minimize this the event organizer would at least need to carry out a background investigation on every customer to identify undercover cops etc. which would add at least $1000 to the customer ticket price. Even so, with little potential for income and significant potential for being busted for something they did not actually do, it's highly likely that many single X girls would shy away from attending an event which publicized the availability of escort services and "private sessions".
The point is that the nature of the business has already changed so much that these organized events are financially impractical today.