A way to change a nonhousehold sims outfit on the fly? There always in work wear....

This mod from Shimrod prevents the use of career clothing
http://simsasylum.com/tfm/index.php?/topic/2824-no-martial-arts-clothes-no-career-clothes/
(there are more flavors - you can choose the mod which disables only career outfits too). Subscription needed, but it isn't spam-site and I have never had some problems with it.
Hth