It will be full for nip g2 people have jobs dude
the arena will surely be packed for the nip-g2 game
I think there is no crowd mics , at least that is what I read on twitter
look at the last majors, there were barely any afternoon-non-weekend-matches with a full arena.
If you are lucky the second game gets visited better, but often only the weekend matches were sold out.
...and also the game has not started yet, so real gamers still get drunk and eat nachos in the catacombs.