Is the after party just a polite way of saying a majority of the girls left Diva's and went to a club together, so they could get away from the massageplanet.net guys? Nobody knows how to boast quite like you, Sheik.
Unless you and the MPA's genuinely get along with each other, these parties are pretty much a recipe for disappointment. Like others have said, most (the ones who know they can score some new clients obviously wont) will keep to themselves and want nothing to do with you during the PR function/party.