Conference registration, check.
Flight, check.
Hotel, check.

Car rental? Meh, would rather not. The company covers it, but it's not like I'm going to be needing to drive a bunch...

I'd like to do a bike rental instead. Now, I know it's not going to be the kind of thing I can pick up from the airport, but once I get to the hotel (shuttle or cab, I guess) I found a bunch of cruiser rental shops just over a mile from where I'm staying. For a few full-day rental fees, I figure that should be fine for exploring the nearby neighborhoods in the evenings after my conference lets out.

Anyone had any luck with getting their company to cover bike rental as a business-travel expense, or is this considered pure selfish entertainment?

-- gnat! (I'm ok with covering it out of my own pocket, but it seems like it would be good eco-karma for my company, no?)