I have seen people having trouble with room charging. One trip my brother and his wife had issues on one day everywhere they went. The rest of the trip was fine. This past trip in our last meal at Mythos they told us when I flashed our room key to get priority seating that they were having problems and could not use it for payment. I have never used room charging. We use cash everywhere so there is no surprises later, while there, or it keeps us on budget. When you just swipe swipe swipe you can lose track of cost.