An obstruction of professors? What is the collective noun for 10,000 gathered academics

I’m in Chicago at the AAR and SBL annual meeting, as a first time participant.  

I’m a little overwhelmed at the scale of it all.  The size of the event, the sheer choice for seminars and presentations, the number of people in attendance, and that the event even has it’s own iOS/android phone app.

As I have been wondering what the collective noun for a gathering of 10,000 academics might be (An obstruction of professors) I have also been amazed that I keep bumping into people I know form the US and UK.

So a great event, with back to back meetings around each meal time.  From PhD supervision with Luke Bretherton, catching up with George Fox colleagues and students, and time with Vineyard pastors and some of my church planting coaches