For a more formal office, perhaps one approach to the clothing problem could be to keep one or 2 sets of nice clothes and shoes at the office (assuming you have the space), and changing immediately when you arrive. I don’t have an answer to helmet-hair though!

Also in the office I mentioned, the bike actually worked quite well for me – I think I got a bit of respect from some of the guys because of it, and some ‘bonding’ moments with the older ones telling me about ther (mis)adventures on bikes. So again it depends on your profession and the type of people who gravitate towards it, but you might be surprised by who had a bike in their youth, or who ride on weekends, or who always wanted one but never had the guts to do it! (My mother’s boss – a very proper woman – swore me to secrecy when she told me she’d had one, she didn’t want her sons to know!)