Going nuclear on pee?
You really don't seem to get out much, do you? As the great Douglas Adams wrote: "Many respectable physicists said that they weren't going to stand for this, partly because it was a debasement of science, but mostly because they didn't get invited to those sorts of parties." So I can see a lack of experience in enjoying yourself and socialising on your side, so let me explain.
Even if I pee before I leave a pub/club/friend's house, there is still a chance that I may develop a pressing need, particularly if I have imbibed a great deal of water towards the end so that I am not dehydrated the next day (which is bad for your brain cells, as dehydration kills them, as anyone who has studied biology in university should know). And I don't know what city or town you live in, but in many, many places there is a dearth of places to actually urinate in a public restroom at night - and knocking on stranger's doors in the early morning hours usually gets the cops called, not a bathroom break.
Now, when I was YOUNGER, and living in the US, we drove to the bars, so we were home in 10 minutes - not really a problem. But that was before MADD, and the vast reductions of allowable blood alcohol levels, and the ever stiffer penalties. Now, like most people, I walk, or take public transport (try getting a cab in London at closing time!), and it takes far longer. USUALLY, there is no need to pee. But there is that one in X times, that for whatever reason...I and hundreds of thousands of others may need to do something that is socially naughty, but should hardly be a crime. After all, DOGS AND CATS DO IT, on the roads, against your fence, etc. So stop pretending to be living in a sci fi fantasy world of white robes, buildings built on clouds, and germ-free living. Organisms pee. Best done in a room designed for it with sanitary disposal of such, but society should be capable of being comfortable for the odd exception (provided it is done with the most possible discretion, which I assure you I personally do maintain). They call it "when nature calls" for a reason. Public displays of peeing needlessly say at noon in front of an open McDonalds (for example) can better be dealt with through the use of normal public indecency laws...