It’s really hard to tell how many where there from the few pictures they have online. Given the fact that Philadelphia is a mostly democrat city, and Penn State has a student body of about 25,000, a crowd of 7,000 is really nothing to write home about, especially at this late date. It is really hard to tell how many people were there from the few pictures they ran. Since the media usually exaggerates rallies and demonstration that they support, and downplay those that they don’t support, I’m betting that the actual crowd size was maybe 3 or 4,000.
Uh, Penn . . . not Penn State. Butm the fact that she was at an Ivy League college tells you all you need to know. Easy there to assemble sizeable crowd of liberal students.
Looking at the picture it looks like your estimate: 3-4k