I applied online. I interviewed at Five Guys (London, England) in Jan 2017
Interview
The hiring process involved both a brief interview (~10 min) with the store manager focused on my attitudes towards custumer service and cleanliness and a "trial shift" of around 3 hours. By the end of the trial you earn a meal and go for a quick chat with the manager again to assess your performance. Overall the whole process was quite quick and friendly.
Pretty chill' easiest interview ever,
Ask about who you are and what you like always looking staff who can be available all the time, asks why do you want to work there and about availability
Trial shift for 2 hours. Shown around various parts of resturant. Shown how to clean the resturant and how to make the food, focusing on preparing and dressing the burgers.
Interviewer asked me basic questions about myself. She then talked about her experience working in the industry. The interview lasted about 15 minutes and was easy. Basically a get to know you type of interview.