How many of those did they have to pay to even be there?😂
I bet a bunch are unions or local activist groups from the nearest college who told members to show up.
I know when I was in college the they heavily advertised dates and times of any event. You would also get some of the more leftist Profs particularly in English, Art, education, Music, Gender Studies, etc. depts to offer extra credit.
Bada bing, Bada boom!