I recall those getting described as: Y Combinator is trying something new to encourage female startup founders. We're organizing a series of informal dinners at which women interested in starting startups can learn more about it from YC alumni.

Looks like it did what it said on the tin.

Not a fan of this choice of thread title, by the way. [Edit for context: it was "Is YC Sexist?"] Racist and sexist are up there with kiddie porn these days, particularly in the bluer parts of the country. (Not that the redder parts of the country don't care, but that sort of accusation is a career ender at e.g. a university campus.) The question mark does not excuse all insinuations.