On my way to work, where I cut out 70% of my commute by taking the ferry, I keep my work clothes on. But still, if I ride for anything more than a block I start to sweat, and my office doesn't have showers or even a decent place to change/wash-up properly.

I roll up the right leg of my pants most of the time, since I think that's slightly less dorky than those cuffs/bands (no offense colaso... well, some offense). And yes, riding in any type of pants kinda sucks when the sweat starts making them sticky.

For the longer ride home I change into clothes that I don't mind getting sweaty. Having access to a shower in my office building would be a dream.