I believe that regardless of what job you are doing, regardless of how little pay you make, you should always be cordial AND professional.
You need to be able to make your clients at ease with you and at the same time maintain your professionalism, including the language you use.
It doesn't stop there though. You may think that clients don't know what really goes on behind the scenes, & they don't, but they usually can sense it.
You should keep your work place professional in conduct code at all times, during breaks, during meetings, with clients, opening & closing.
However, I will say the set up was nice. Of course I would have changed a few things about it, but it wasn't too bad.
I felt good about what I was doing to contribute to the company
Professionalism & company was going out of business