I had no idea...

Huh! 86 years of misleading people!
Vomitoria were no place for vomiting, it would seem.
Take THAT 7th grade Latin teacher. Sorta. She barely taught us Latin.

Anyway, interesting to note!

clipped from dictionary.reference.com Main Entry: vomitorium Part of Speech: n Definition: 1754, "passage or opening in an ancient amphitheater, leading to or from the seats," from L. (Macrobius, Sat., VI.iv); see vomit. Erroneous meaning "place where ancient Romans (allegedly) deliberately vomited during feasts" is attested from 1923. Etymology: Latin vomitorius, alluding to the path's discharging of the spectators Usage: plural vomitoria