Because we normally only perform in theatres any changing takes place in dressing rooms back stage. But we're always put into dressing rooms by section so the brass will be in one, the woodwind in another etc and you're not allowed to mix between the rooms.

As the brass is the smallest section, we get the smallest room and as I'm the only girl in the brass and theres never any space for some kind of partition(and I don't care anyway) the entirety of the brass section has seen me running around the dressing rooms just in my underwear looking for clothes! They don't even react anymore!