There is an internet cafe as part of Alt-C, part of the library on the right as you go in. It is also confirmed that there will be wi-fi in the Peter Chalk Centre.

Not sure how many people might visit Life Bytes. It seems a more self-contained event than the Science Fest. Still, as the library calls itself an internet cafe for the occasion maybe one with actual coffee is within the scope.

Joke. Man walks into a library
Man "I'd like some fish and chips please"
Librarian " You do realise this is a library."
Man (whispers) "I'd like some fish and chips please."