Packs kann man zwar inzwischen öffnen, aber es läuft anscheinend noch nicht „rund“:
[Added 7/29] [Hearthstone] The team is aware that Fireside Brawls are not functioning at Pre-Release Weekend Fireside Gatherings. The team is also aware that players who enter a Fireside Gathering are then having issues joining games in any game mode until they restart their client.