If I have documents in a locked briefcase in a hotel room, does the police get to read and copy them with the hotel operator's permission while I am in the shower? Assume that the locked briefcase is not particularly tamper proof. Anyone with decent lock picking skills can open one.
Is it your locked briefcase or the hotel's? I believe hotels have the ability to unlock their own safe, so I suspect they're allowed to ask the hotel's permission to look without a warrant.
Also, if a hotel cleaner found illegal material lying in your room, the police don't need a warrant to seize it and prosecute you.
If it's your briefcase then I think they need a warrant.