AirNZ Regional... "basic" uniform in the sim (don't need the jacket or the hat etc). They're rostered work days... can't say it really bothers me one way or the other, saves me 5 minutes in the morning trying to figure out what I'm going to wear I guess... plus I know where my pen is!
Only exception was the initial type rating (which was completed in another country), chinos and a collared shirt... was not a "rule" as such, more that I think the Sim Instructor couldn't be arsed with uniform and none of the other outfits using that sim centre seemed to wear uniform
