I went to a job fair (submitted application ahead of time), the job fair was a little overwhelming and the wait for anything was long. There was also a TON of paperwork. When you show up you let them know what job(s) you want to interview for. They can fill up, so make sure you put the one you want or are most qualified for first. As a tip: a lot of people show up with their kids or in unprofessional attire. I dressed up and got hired on the spot. Don't be shy, they are looking for people with confidence and good customer service/speaking skills.