So to the Savoy, or more precisely, to Savoy Court, the only street in the UK where vehicles are required to drive on the right. Apparently, this is a hangover from the original horse-drawn hackney carriages, where drivers would reach out of the driver's door window to open the passenger's door, without having to get out of their seat. I'm not quite sure why this would particularly make a difference but it seems to have stuck.
The hotel itself is currently closed for refurbishment so you'll probably have to wait a while to observe this faintly interesting phenomenon.
Wikiresearch on this also told me that the hotel entrance's small roundabout meant that vehicles needed a turning circle of 25 ft (8 m) in order to navigate it. This, we learn, is still the legally required turning circle for all London cabs.