The office culture where I work is casual. The men wear polo shirts, blue
jeans and casual shoes. The women wear more or less the same, but their
variety of shirts are wider. They often wear skirts too.
When we talk about executives, this changes totally. Men must wear
conservative, dark colored business suits. Women must wear suits or dresses
that are elegant and feminine with good quality accessories. In both cases,
you should never dispense an excellent coffee.
It's good practice to break the ice before starting business. Always look a
person in the eyes. Then, you must be objective. Oral communication is
preferred.
Always have in your plans excellent proposals.

Enjoy,
Marcos