OK, I googled and found this schedule:

http://www.austintexas.gov/sites/def...c_schedule.pdf

How big are the venues given that they appear to be available to ticketed customers only? It's been more than a decade since I traveled through AUS. At PDX we have local musicians entertaining the crowds walking by, but it's not really a situation that requires cancellation due to a 2500 people maximum rule.