A guy goes into a bar. He's sitting on the stool, enjoying his drink when he hears, "You look great!"
He looks around and there's nobody near him, so he just keeps drinking his beer.
A few minutes later, he hears the voice again. "Sharp tie!" it says. The guy looks around again, and again there's nobody around.
After another couple of minutes he hears, "Is that a new shirt? You are absolutely glowing!"
The guy realizes that the voice is coming from a dish of nuts on the bar.
"Hey!" the guy calls to the bartender, "What's with the nuts?"
"Oh," the bartender says, "they're complimentary."