[lilpirate]

Meetups like these generally have an overlapping crowd from other tech community meetups like RoR, PHP, WordPress.

[babuskov]

And Hackers^H^H^H^H^H^H^H computer security experts, as well.

At least, the one time I went (I'm not from UK) I met a couple of guys who run pen-test businesses. Apparently they were completely unaware of YC and got the other meaning of word Hacker.