I rode by the base of the Space Needle the other day, and saw a valet waiting for work, so I asked how much it would cost to have my bike parked. "For you, no charge." Bikes are fun.
Does the bike valet parking encourage more people to bike in? Whenever parking is a mess because of some festival, it means traffic will also be horrid, and cycling is probably the most convenient way to get there. So for there to be bike valets outside of my own sarcasm, can only be a good thing.