Yeah, this is a funny grey area at present, that will ultimately need some sort of better solution. Once EVs get popular enough so these are always booked up, it's going to be a problem to have wasted service time. And I don't think they'll build out so many connectors that it's not a problem. One partial solution is to have two parking spots covered per adapter, to give some parking and plug flexibility. Mostly I just see them all in a row, one per spot.
At a couple of the hotels I did destination charging, they had a 3 hour max rule for the parking spot. This was their solution to getting people to move, but it didn't work for me because arriving at 11 pm, there is no way I was waking up at 2 am to move my car. I just pushed my luck. I know the front desk doesn't want any auto liability about moving cars, so leaving a key with them was a non starter. They didn't even want to have to call or text someone to let them know to move.
We could use some sort of social contract where well behaved humans try to not hog the charger, but it's hard to see how this would be communicated or work. For my part for example, I'd be fine with someone moving my car to a new spot, activating the car to drive remotely. Especially for another EV owner, or a hotel employee, this would be fine with me. I know lots of folks would abolutely not sign up for that. I'd rather have a valet move my car as needed so I don't have to wake up to messages.
Currently the rule is first-come first-served with no time limits. That's also a possible solution, even if it's sub-optimal use of resources.