On my first day a veteran TEDster tip from someone was “be sure to get out to the simulcast lounges”. Never had I seen this at any conference I’d been to, and agree it was great change in energy. It was a place to eat, use electronic devices, and sit around without the formality of auditorium seats. I would be there at least for one session a day just to mix it up. It was an area they also used for displays, activities and conversations. Quite the production effort really, which was one of the most remarkable kudos to their team.