---Being interviewed---
I interviewed for a Sales Associate position several times over the course of one year. All of them were group interviews. They were either intimidating or offered a chance to shine and present yourself. I managed to completely butcher my final interview, but the manager acknowledged my passion for the company, image, brands and work ethic. I was offered the job and I've clearly done nothing but impress them!
---Hosting an interview----
I was given the opportunity to run several one-on-one interviews for black friday/seasonal associates, pull together promising applicants and organize group interviews based on experience/portfolios. With it being directly before the holiday rush and it being my first time, there were a few minor details that were missed and a few call-backs that had to be dealt with one-on-one.
The company has a several page hiring document for relevant talent organized into 4 categories with several questions each. Categories such as situations, customer interactions, opinions and "have you ever" sort of questions. As long as you're confident, enthusiastic, personable and well worded you seriously have nothing to worry about.
I advise reading up on the brands and actually developing an "affinity for the product". (company verbag)