It's possible that it's a misunderstanding not a complete lie.
Someone said that at first, and then changed to say that there was a room at a previous conference, GDC (which was a Game Developer Conference in March 2013) with an ugly rug and that caused it to be named 'the Cosby suite', suggesting that they then doubled down on the joke even without the rug. I'm not saying that it is true or even makes sense, only that even if it looks like a complete lie there may be a truth inside it.
Misremembering and forgetting parts after that long time makes sense (especially if there was nothing traumatic for you); so we shouldn't go after everyone based on that yet.