A reader writes: I'd very much appreciate some advice from you and your readers on how to develop a poker face for the workplace. I have had. This is an important distinction to make because most poker faces fail when people try to maintain a specific expression for it, such as a frown or smirk. A poker. How to Have a Good Poker Face. Having a good poker face is harder than you think when tensions are high. It can be very difficult to contain your reaction.