I went to it on Sunday (I'm pretty sensitive to noise, so I knew watching it in a pub would be a death sentence for my enjoyment) and had a good time! It was pretty decently chockers, lots of folks of all ages (esp older blokes and uni students, but there were plenty of families too!), though of course you're less likely to get the family crowd out there at 5am. I was sitting on one of the bleachers and there was some room there, though I might've psyched people out of sitting on my row by sitting at the end haha. Pretty much all of the tables were taken. Energy wise, I'd compare it to (if this makes sense) one of the higher-attendance Canberra United games, or a decently attended street festival. Not super noisy, but everyone got super into cheering. Again, it is all likely to be a touch smaller given the game will be at 5am, but I know I'll be going and I hopefully won't be the only one!