they are probably on their break or stopping by somewhere before heading home. when i get off work, i just wear my scrubs till i get home. doesn't make sense to change into street clothes.
if anyone is worried about it being comtaminated, it is not. when we do any procedures with the patients or when it calls for it (ie. patient is on contact precaution because of an infection), we do wear disposable protective gowns that covers pretty much to the bottom of our pants, gloves, shoe covers (when needed), face mask, face shield, protective glasses, disposable hair hats, and you name it and we have it. when we are done, it gets toss in the trash. and we don't recycle these protective gears with our other patients.
and if by chance, if my scrubs gets any spills of some sort, our hopsital have clean scrubs we can change in to. i always change into the new scrubs immediately right after the spills.
sometimes health care providers work 16 straight hours 6-7 days a week and the only time they can run their errands is during their break.