There was one quite a while back where they used one of the private rooms as a bit of a viewing area... just had one PC that joined the game as an observer and filled that room to watch. Was quite good, but unsure if they can spare two rooms since often one is used to get a bit of quite space for the stream.
For that event we had ~8 in that room, and whilst it was fun, we ended up trading that for a stream. As tgun has said, 2 rooms is out of the question, we are lucky to get one.
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