since I usually give a single when I get the car from the valet at Children's Hospital. But then, on vacation, I guess I have done $2 on normal dropoff and $2 on pickup (usually a two dollar bill, which is kinda fun, and might be mistaken for a $5), and then a $5 to the bellman. When at AKL two weeks back, I tipped this nice Haitian cabbie $20 on a $25 cab ride tho (round-trip), since it was pouring down rain, and the fare was to Publix to buy provisions for the week; this cabbie waited for me in the Publix lot in the pouring rain, so IMO this was money well-spent; plus, the $60 worth of groceries probably saved us $500+ over the week.