This sounds like a good afternoon. I'm going to a gig in the evening too.
I've been looking for something like this for a while, I've always wondered how people get recruited into startups without 'being in the know' as it were. When you look at job aggregators 99% of the jobs are for huge corporates, usually through the proxy of a recruitment agency.
My only concern about this event, for me personally anwyay, is I graduated 3 years ago and I've been working professionally as a developer as soon as I left University. I'm not sure if this event is aimed at people like me or fresh out of uni grads or not.