To say it another way: We call them lecture halls, not debate halls, Yud.
From all my years in physics, I'm hard pressed to remember anything that resembles a debate as Yud seems to envision it. You might occasionally get a panel, where N participants sit on a stage and provide O(N) opinions.
I don't know of any either... To amend my earlier comment: it looks like a ghastly New Scientist/Forbes cocktail-party axis, with a dose of TESCREAL.