vomitorium•
noun (pl. vomitoria)
1. each of a series of entrance or exit passages in an ancient Roman amphitheatre or theatre.
2. a place in which, according to popular misconception, the ancient Romans are supposed to have vomited during feasts to make room for more food.
— origin Latin.

Okay, I also thought that the definition of vomitorium was the second. And I’m pretty sure I’ve read it used in fiction with the second (incorrect) meaning.

Actually, it might be amusing to point out exits at the CAC as vomitoria.