I never use the hotel cups, and I keep my toothbrush in my washbag. You cannot be too careful.
I know someone who, before getting in to bed, strips off all the covers and pillows to make sure there are no 'extra guests'!
I try to be nice to waitresses and waiters. They do a good job and they don't get paid a lot.
I remember sending a dover sole back because it stank of dog poo. How the waiter had not smelt it as he brought it to the table I do not know. It was replaced with a chicken breast that was half cooked and red in the middle so I made a loud noise about it and got up to leave. We were getting our coats on when the Head Waiter came up with a bottle of wine and an apology. Never went there again, and never paid the bill either.