Most cruise ships rarely tie up on the same side twice in a row in most ports.
Many factors decide which side of the ship will face the pier:
How early or late the ship arrives.
How early or late the ship needs to depart.
Which pier the ship is assigned to.
What sort of gangway the port authority will be providing.
Where the x-ray machnes were left at the last port call.
Which side of the ship needs painting.
Which side of the ship needs window washing.
Whether or not provisions will be loaded.
Whether or not water or fuel will be bunkered.
Which side the port authorities tell the Captain to tie up on.
In many ports, even the ship's Captain does not know which side he will tie up on until just before arrival.