Take a break from Newcastle go somewhere else and book an indie, either to your hotel or go to them.
As for WS, done it. Urine is quite safe, just the smell that can put you off, obviously you will find more girls willing to give than receive and as long as you make clear your boundaries/limits beforehand with them. I find it better to do at the end of the booking, obviously when you prepare before, you might find it hard to retain water.
Know it is not to anyone's tastes, which is fine, but as with anything new you are not sure of, make clear what your limits are beforehand, you can always 'go a little further if you feel comfortable' with what you are doing. If you have doubts, don't do it.