Well i like the idea of having a time alone with every girls at the party, and i guess it would be in a more quiet environement so that would be great on paper.
Pratically speaking tough, i am not sure this would work. As considering how many people there is vs the number of girls(even including indies), we would be in line or something for a long time, waiting our turn. Once we would have "pass" we would return to the party and chat with only the guys? Not only to mention how our conversaton would be too short and always interupted.
My opinion is this would probably not work well...
Personally as classic as it may sound, a good old classy soirée would totally do it for me. Just gentlemen talking to the ladies and among themselves.
I mean, so far it has been proved that the girls are not confortable to do raunchy stuff in parties too much. I mean i heard of "lesbian shows" and wet t-shirt contest announced and it never happened. As much as some crazy stuff like that sounds cool on paper, it seem to only work when its improvised and on the spot. I remember turning around and seeng Ariane in her bra at some pont, i tough it was cool, but it was in a totally "random" setting and im not sure she would had been confortable doing a strip show or something. (or maybe ... you know her better than me lol, but you get the point) . In the same vein i remember Kelly Summer being totally topless at GG2, but she is a well known pornstar. She ain't the shy type. Escorts are not girls gone wild, they are in the elements in personal setting, not that much in giving open shows. Some may be... i know some do bachelor parties but again its usually much less guys.
In any case, this may sound boring to some, but a nice soirée in a good place, where people meet and have fun with each other, just in a relax cool setting. Not very themed... but always effective.
My other option is a little more themed and wild. You could rent a house or a big place for a day or something, charge a bigger cover, lets say 50$ per person, have a "BYOB" setting (Bring your own beer/achool) and the cover fee would only goes to the renting of the place. Would probably cost around 1000$ or so, but with 5 guest you have 250$ ... 20 guest and your in the 1000... Im not sure what it could be, a condo, a full house, dunno, you would need to make sure the place is ok with having parties there. That would be the most important thing. It would need to be big enough to have your number of expected guest. In summer time it would be killer having a pool/bbq setup, but this would of course not work for febuary.
Now this part im not sure if possible due to the law and such, but you could have an incall running with in the rooms. Maybe to cover your back you could put some system where the payment would be done discretly some place else. Honestly im not an expert in that, maybe Eager would be better to answer this. In any case the incall option is just a sugestion on top.
But i really think the best thing would be to rent a place, pay the room, charge the apropriate cover, and allow the guest to bring there own alchool. Everybody would be happy as alchool is MUCH MUCH cheaper at the stores than in bars, so paying a bigger cover wouldn't really be a problem. You could get back in the money also..
Anyway, im sure some members would come with better sugestions, more original, and all. But i think its important to note the real goal of these GTs, being able to interact with the ladies. All the rest is "not nessary" and extra. There is easy way to not only get in the money, but also make some, and still have a great party and "hooking" clients on some of the ladies present for futur bookings.
In any case if you ever need a hand for organizing, i would be glad to help you based on what you want. I know you are busy and you may not have the time to look for places to rent and such.