I do maintenance for a pub chain and a common complaint now is smelly gents toilets, as soon as you go in it hits ya, Whats happening is the druggies come into the gents with their fix of whatever it is wrapped in klingfilm, they unwrap it and snort it or make a roll up with it and then throw the klingfilm into the urial flush cistern, after a few wraps the syphon gets blocked and it won't flush, it overflows and someone turns it off not to give the game away, so then the urinals don't get flushed and soon after they start to smell, so if you go into a pub with smelly gents, there's a good chance drug dealing is going on in there,
You know your in one of those places when the tops of the cisterns in the traps have a non setting mastic on them to stop them being used for a line of coke
The previous people who used to live next to me were constantly smoking weed in the garage, the smell somehow got in through the nocks and crannies and could be smelt in my room. I reported it to the police, luckily they have moved out.
Many years ago, a friend of mine worked as a cleaner in a nightclub. She was amazed at the amount of drugs she'd find in the mornings when cleaning. She could have made a fortune, but threw them all in the bins.
Some places now install special lighting so druggies can't find a vein to inject....bloody horrible. Worst still is when you get a **** hole to work in and on your way home you can smell the **** on your knees... I had a needle stick injury about 3 years ago from a needle that had got stuck down a flush pipe....had twelve months of hell.