This is a very good reason to go in Japan: the SEGA Toylet!
Why stop to play when you have "other" needs?
Finally, urinating is no more a boring task! 
With two different sensors, an infrared one and a microphone to hear the "dripping", there are many different games, for measuring your "aim", "power", "speed" 
Available in some Tokyo bars, I bet that the water bottle sales will skyrocket
I can see a long line for the male washroom...
Let's hope for an "home" edition? 