With so many people looking for work, employers are finding new ways to weed through applicants - and one of them is the lunch interview. According to the career website AllStarResume.com, taking a candidate out to eat helps HR people get a better feel for their strengths and weaknesses.

So, here are 4 tips for making your lunch interview a success:

First: Turn off your mobile phone. William Arruda is the author of Career Distinction: Stand Out by Building Your Brand. And he says it’s never appropriate to check your phone - even if the interviewer checks theirs.

Next: Maintain professionalism. I know, it seems like a no-brainer, but people sometimes lose sight of this at a restaurant, because it seems more informal than an office. But companies will often send you to lunch with a “friendly” employee – that’s someone around your age, with a similar background, who adopts a relaxed approach. The goal is to make you comfortable and see how you behave when you let your guard down. So, don’t forget this is an interview.

Interview tip #3: Be cost conscious. J.T. O'Donnell is the author of CAREER REALISM. And she says that ordering moderately will demonstrate that you’re someone who’s financially responsible.

And this last lunch interview tip is the most important: Treat the wait staff with respect. According to a recent survey, more than half the HR people said that being rude to a waiter is the single biggest blunder you can make during a lunch meeting.