When we had our orientation for my current job last January, it was held in an auditorium of a certain hotel in Clark, Pampanga. We had it with another province and the venue was just divided so the two provinces can be accommodated and separated. Our group was told to occupy the last row of chairs---which was quite far from the speaker. When the province on the other side of the venue started their orientation, we could hear what their speaker was saying and we couldn't concentrate much on ours. Talk about soundproofing! Anyone?
Since I really couldn't concentrate listening to our speaker (and we're on the far end of the room pa!), I just inspected the "improvised division" of the auditorium. I noticed that they only used a common foam instead of an egg crate foam to somehow give a soundproofing effect. Also, not all speakers were functioning at that time in our part of the auditorium. I ended up just listing down a few notes from what I could see on the projector.
One piece of advice I can give to anyone who has or manages an event center like this, make sure that if you divide one room into two, use a reliable soundproofing foam. This way, what's happening on each other's side won't interfere with the other. Plus, make sure too that speakers, microphones and other equipments are functioning well. That's all. :)