My highschool was more than 2000 people. And it was so new that our first semester was on two different campuses and they were still building int around us for another two years when we did move in.

Now I live in a very different area. The localist mega church gets 17,000+ butts in seats each week.

8500 people is less than normal tourism on a Saturday for DC. It was actually a net negative for attendance over just a normal day.