crum,
I know this isn't the "civi" world in here, but I think maybe the ladies still prefer to be asked personally for a date.  I don't mean to be putting you down, but just a thought especially when you tried this before with no success.  The ladies put up their ads and they sometimes post specials or times when they are available for incall.  Beyond that it seems they would rather be contacted and asked by a specific guy for a specific time than to compete with each other for your time tonight.  I might be wrong about that, but it just seems more natural to me.  Hope that thought helps some.

cmeflyhigh