That sucks. I remember those days from law school well (though we usually didn't have the early morning things, thankfully). Still - the long hours can make it hard. I did have a suit I left at school, and would still bike commute some days (we had a shower too, if necessary). I think you could probably do the century if you can get some training in during the week - maybe get a trainer and do spinervals in the early AM or take a spin class. Any chance of riding early and then heading in? Otherwise, you can probably do it (assuming there's not too much climbing involved) - the question is how comfy you will be by the end

CA