Oh how we jump to conclusions!
We have a no smoking in the room policy, whatever it is. We also do not allow parties or other people staying overnight. They broke those 2 rules, so my wife spoke to their boss, who was paying for the room, who said she can deal with them. She spoke with them reminding them of the no overnight guests, to which the guy said that he works for his boss. In response the boss said "chuck them out now". When told, they asked if they could stay until the 21st, which my wife agreed to if they followed the rules - that night they did the same again.
It wasn't until they had left that we discovered the disgusting state of the room, stinking of whatever they had been smoking, burns in bed sheet and mattress topper, the bathroom flooded because they had blocked shower drain with fag ends being deposited.