Jason,
With GF : only the first week in "business attire", thereafter we will be issued with uniforms. Not too sure about EK.
Luckily I already have to wear pants suits etc. for my current job so I didn't have to buy much.
Apparently clothing is quite expensive in the sandpit so buy as much as you can @ home before leaving, well that was just another excuse for me to go on a huge shopping spree the other day... teeheehee.