the cause varies. First, it may be because of the position of the router, in hotel floors there are many rooms and this means there are a number of walls that block the wireless signal from the router resulting in the decrease of signal strength. Second, the distance between customers' devices and the router may be far. The farther the distances is, the weaker the signal. Third, there may be many customers using signal at the same time. Last, the package of the internet that the hotel has may not be fast enough to handle a large number of users.
Now you find how to make wireless Internet faster and tell me.