I applied in-person. The process took 1 week. I interviewed at Hyde Park Art Center (Chicago, IL) in May 2015
Interview
I was invited to Hyde Park Art Center and asked why I wanted to work there, what experience I have related to the field, my availability, etc. The interview wasn't long; lasted about 15 minutes. Later sent a thank you message, and got a response a few days later saying that I got the internship.