Or that even if it has a charger and it is functional that it won't be already in use or blocked by a regular car. I've had all of those happen before and it really is a crappy idea to rely on chargers in hotels. The only one this has worked at really well was a very posh hotel in Yorkshire that had a valet, I asked if they can charge my car and they did, the car was fully charged the following morning when they brought it out - but that's a place where the entire charging situation is managed by the hotel, so they knew how to do this and I didn't have to worry about it. I guess once you throw enough money at a problem it's "easy".