I wish I had this mod sooner! My college girl married and had twins with the school horse. When she graduated and he moved in with her he kept the stupid hat no matter how much money I sunk into a new wardrobe. I couldn't take it and eventually arranged for him to meet with a satellite. And now you tell me I didn't have to kill him? Aaargg!!!!
I started my own business yesterday, and that was one of the first things I tried to figure out.
Under Management there is a Set Uniform option. You can set your own uniform and that of your employees. You have to tell each one individually (unless I missed something). You can make a company-wide uniform or have each employee wear specific clothes. You can have your greeter wear a red lawa lawa and the cook a green, etc. for easy recognizeability. The entire range of clothes is available, from everyday to athletic.
You have to make sure that the clothes you use are either useable by teens and elders (male/female) also or else you'll have to make different clothes for them. I ran across that problem when I hired an elder saleswoman. I had to give her something I didn't like but it was that or street clothes.