This will always be an open ended question.  What will not work is charging the ladies up front for attendance.  Nobody is going to do that.  Its really no different than when a lady asks for a deposit up front.  Many if not most gents will not do that.  The things that would have to be done to put something like this in place is large and I don't think any M and G host would do it.  I certainly would not.

As a host, we usually plan for about 50% ladies attendance and 65% Gents attendance.  For my parties, its been as high 70% ladies and 75% gents.  But that was very unusual.  Uusally its very close to the 50 and 65.  Usually the gent to lady ratio is 1.5 to 1 or something like that.  Maybe a bit less.

This is not a perfect science.  A lot of it is just pure luck.  I can't see how we can make it any better.

Bond