Maybe you should start by trying to figure out actual helpful suggestions, and then we can worry about whether people will be offended by them.

Good advice, I think. It is hard to tell (without an example) whether any gimmicks that work to get women into bed with you also work to get women to meetups. I would guess that any convincing way of communicating the message "Come on! It will be fun!!" would help with both.

Anyone have any brilliant ideas?

Call his attention to the stuff under the guise of soliciting a male opinion on whether it is offensively misogynist and nasty. Then let him make his own adult decisions as to whether he wants to make use of any of the information.