Besides, let's be honest - even if it was a private invitation, it was an even by some VC, so presumably lots of VCs would have been present. I'd be very surprised if women would not also routinely get the advantage of being introduced to VCs because they are women, which men don't get. It's dumb to not take advantage of that because of some weird puritan moral that attractiveness is not supposed to exist. She mentions herself that "attractive" male CEOs seem to get more funding.
Edit: reply to comments below - first, do you really think a guy having sex with an investor just to get investment would not be called some unfavorable things behind his back?
And being invited to a party with VC is a net positive option. Ignoring it would merely put her back to the level of men, not below that level. Feeling pressure to go there - really? As I said, it is strictly a positive option, ignore it and you can still do all the things men do to meet investors. And maybe that guy merely thought she would be interested in meeting VCs and proposed that as a date because of that. What's wrong with trying to cater to the interests of your date?