I haven't started commuting yet and I have a shower at the health club across the street, so this isn't going to be an issue for me, but are there any closets (for winter coats or rain jackets in the summer) that you could use? Maybe one that a little out of the way and doesn't get used much? Hang your stuff towards the back. And if your stuff stinks, you'll always have that closet to yourself! : )

Obviously, you'd want to avoid the closets where any visitors might hang their coats!