[britta]

Google distributes stickers that say: "I'm a woman in tech. That doesn't mean everything has to be pink." See https://twitter.com/blackfemcoders/status/318072430771978241 for a photo. They're very popular at women-in-tech events!

In other words: trying to make your event more welcoming to women, in an effort to compensate somewhat for the industry's systemic sexism - sure, that's a good idea, and there are experts and nonprofit organizations who can advise you on how best to do that. There are also lots of blog posts about good strategies. Handling this clumsily, with pink stuff and calling women "girls" - not so good execution.