A murder of crows. Make up your own collective noun.

A delusion of acidheads

A blathering of pundits

An obscenity of Republicans.

A backpatting of democrats

A decolletage of dowagers
An impediment of regulators
A mutation of Habsburgs
A re-enactment of cosplayers

A cite of Dopers?

Not my own work, but I did once hear of three London prostitutes referred to as a trey of tarts, a fanfare of strumpets, and an anthology of English pros.

A cacophony of cyclists.

An argument of Dopers.

A dose of toxicologists.

A deadlock of politicians

-“BB”-

A bend of saxophonists

A fire of Jabberwocks

A portmanteau of collective nouns

A shell of a lot of turtles.

A truly great simile of metaphors

A _ of Minimalists

A cordial of Canadians

A chill of penguins

I was an interpreter for 15 years, and I don’t get this one. Yes, I know it’s been years, but killing time, and checking this thread out.

I am an interpreter myself, and have mostly worked in a booth, with a colleague or two. That is simultaneous interpreting, as opposed to consecutive or to whispering (chuchotage) interpreting. Here is a rather basic model, here you see a video by a colleague from the European Parliament with good standards.
So in my experience interpreters come in booths. The Spanish booth is also the collective noun for all the interpreters working for the Spanish Language Unit at the European Parliament, there is also a Spanish booth in the Council (SCIC - Service Commun Interprétation-Conférences) that also works for the Commission. Same for the German booth, the English booth, the Greek booth and so on, for a total of 23 booths. Biggest interpreting service in the world, lots of languages, lots of meetings.