I was at my local casino boat yesterday and this happened to me. It has also happened in Vegas.
Just wondering what you do or would do in this situation.
Someone asks you to 'watch their machine".
I never, ever have asked someone to watch my machine. If I need to leave it, I just leave it. I think it's very rude to ask someone you don't know who just happens to be sitting next to you to watch your machine. (of course stepping around the corner and back is no big deal, I'm talking about going to the bathroom or the cash machine). Inevitably 14 different people appear wanting to play said machine and I am forced to tell them, "someone's playing that, sorry". Most of all I know how I feel when I see an empty machine and when I approach it, someone tells me that. Secondly, I have been in situations where I'm ready to leave my machine and the jerk isn't back yet!
So....does this bug you? Do you do it? Do you watch for people? Do you ask people to watch for you? If you refuse, what do you say??