Well, not quite work clothes, but basically jeans and khakis. Maybe the occasional business attire, but if I'm going for that I probably don't want to show up sweaty.
Right now I've gotten into the habit of tucking in my pants into my socks, but I think I may look into the strap idea.. that sounds really good.
Last time I tried not caring, I had my pant leg get caught in the gearing... which didn't turn out too good.
For a second I thought about using nylon ties, but then I realized you can't remove (or then reuse) them.