The old truth that everyone who spends days on business trips: hotels generally suck at local Internet delivery service. The least important service in hotel is pretty crucial if you depend on it to finish some work after business hours.
However, if you are on Linux/Ubuntu machine there's a nice tool that will allow you to evaluate WIFI signal quality. It's name is: wavemon. It's a console tool that shows current (and previous) signal strength.
Having real-time measurement you can decide what area of the hotel have the best signal strength.