So what does your boss require you to work whilst you're at his/her establishment. Is it casual and relaxed which allows you to wear Jeans and T-Shirts or it is formal with smart dress and appearance? As I work in an office and regularly see clients I have to wear shirts/ties and black trousers/slacks. At special times of the year such as Christmas I can wear some Jeans and some knit-wear over the top of a shirt. I can also lose the tie!! On saturdays as well I can relax things a little aswell with some jeans and sometimes trainers.