I have the same problem,Also, it it hard for me to remember their names.So,when I meet them in the moring,I always just say "Good moring" without calling their names.I heard there is a way to remember people's names well. You can put some imaginations on it. For example, "fat-ass Jackson", "big-boob Natalia" or " long-leg Alex". It didn't work for me due to my poor imagination and I am afraid they will kill me if I call them in this way by accidence.