I also had a long stay in a hotel, and I plugged in my own chromecast as what was available on their limited cable selection was...lacking.
After two instances of jokers starting to stream something over it I just left it unplugged when I wasn't using it. My bad for introducing an insecure device onto the hotel wifi rather than setting up my own little network, but I was lazy.
My Apple TV, if you choose to make it available to devices nearby (can be turned off entirely), still requires a random code, which it displays on a connection attempt from an unknown device, to be entered on the connecting device.
It’s come in handy, because our neighbors sometimes accidentally choose our Apple TV instead of theirs apparently. The only thing that happens on our side is that the TV turns on and displays the code, but our neighbors don’t see the code and likely realize their mistake then.
After two instances of jokers starting to stream something over it I just left it unplugged when I wasn't using it. My bad for introducing an insecure device onto the hotel wifi rather than setting up my own little network, but I was lazy.