Human Resources consultant Scott C. Maxwell says it’s quite a good sign to score a lunch interview because the atmosphere is inherently casual and will naturally put you at ease.
“The more relaxed atmosphere is a sign that you’re closer to the job,” writes Maxwell in his article How to Master a Lunch Interview.
Most experts agree that while a lunch (breakfast, dinner, or even coffee shop) interview is a more relaxed atmosphere than in the office, it usually means that the interviewer is evaluating you in a different way. Sometimes a potential employer will schedule a second interview at a restaurant is to get a glimpse at your social skills.
“Taking you to [lunch] provides the interviewer with a chance to check out your communication and interpersonal skills, as well as your table manners, in a more casual environment than an office setting,” according to Alison Doyle.