This happened to me once at the Renaissance LAX. I woke in the middle of the night to hear gushing water in the bathroom. I went in to find what looked (but thankfully didn't smell) like sewage bubbling up from the tub. I called down, the maintenance guy came up, and he said there was nothing he could do. Something about clogged pipes in the room above was apparently making this happen with some regularity.

Luckily the hotel was not sold out, so they moved me to a suite on the club floor. The next day when I came back from work there was a handwritten note from the GM offering to comp my stay, but also acknowledging that he saw I was on a business rate and that I might prefer a batch of MR points. He left his personal phone number and asked me to let him know which way to go--I took the points, which credited before the hotel stay even did!