If you're trying to eat for free, hit up that girl Rachel that posted on the event page. She runs a non-profit thing called "Feed the Scene". She feeds and gives out of state bands a place to crash for free. Apparently she makes some pretty ill food too.
Aside from that... there isn't much in the immediate vacinity of the venue, since its in a financial type district. Its actually right next to city hall. Its really close to the harbor though and there are tons of places down there... but its touristy and can be pricey.