"Working the the room" is a political term, @waybeyondpadthai. A politician makes sure to greet ALL the people in a room so they all think they met him. He does not just stand around with a few people he already knows.
Using this for my old jobs:
If I went to a conference for my company, I would need to "work the room" to see who might be possible clients or suppliers and write reports about it nightly. Then keep working it for the duration, with feedback coming from the office back home.
Using this for STEEMFest:
Like you, I already know some people in person from STEEM. It would be easy and fun to hang to with them for the whole time, but there are many more people I don't know, and I want to meet as many of those as possible. Who knows what those new connections might bring for us all?
So there are strategies for all of this, so you can do it and not burn out. We have 6 days which is really long for this type of thing. I feel thrilled and exhausted just to think of it :)
