Lots of venues in Sydney, see attached link, No cover charge ...
http://au.setanta.com/portal/systemcontent/page?open&systemtitle=ozvenues:pubchannel
For the very late games, you'll need to check with the venue toi make sure the're open..
I watched the Tyrone game last night in PJ O'Briens, but they closed after it and didn't show Mayo - Galway .. Lots of other venues with later licenses did though ...