Sorry about this one:

A guy goes into a bar. He's sitting on the stool, enjoying his drink when he hears, You look great He looks around - there's nobody near him. He hears the voice again, No really, you look terrific. The guy looks around again.
Nobody. He hears, Is that a new shirt or something? Because you are absolutely glowing He then realizes that the voice is coming from a dish of nuts on the bar.

Hey, the guy calls to the barman, What's with the
nuts?

Oh, the barman answers, They're complimentary