If they don't have enough for guests to use all night, they don't have enough chargers. Playing stupid sharing games just makes them useless and they might as well not have any.
Hotels need to solve the charging problem, not just make a half-fast effort. Doing all the wrong things is why the non-Tesla charging environment in the US is so bad.
I'm at a hotel now without charging even though there is another hotel nearby with a slow Chargepoint that charges idle fees as well. To me, it makes no difference whether there is a charger with punitive fees to use overnight or no charger at all. I need my sleep at a hotel so I'm not going to stay up all night watching the charging so I can move my car when it is done or. This is particularly bad with Chargepoint junk where you share a 6 KW station with another port - you have no way to guess when it will finish charging since it totally depends on whether someone else arrives later or quits earlier.
This, of course, begs the question about reservations for a charger. Hotel charging won't be serious until I can reserve a room and a charger so I can plan to arrive late and know I'll be able to charge when I arrive. Otherwise, I'll have to have a reliable backup plan in case I can't charge so, it's hardly worth having them provide a charger.