White-collar

I need to balance up the amount of photos on workers with photos on white-collar workers. But they are harder to see. Not because they are not working, but because they are indoors. So I thought. And it was wrong thought! 
I am incredibly stupid. After all, I see white-collar workers every beautiful summer day on the job office's roof terrace. The clothes fool you. They have very casual clothes; jeans and t-shirt. And I have not caught them in the act of work, only at their lunch break. But anyway, here you are: white-collar workers at a governmental office.