A man walks into a jazz bar in Caribbean and orders a pina colada. He takes his first sip and sets it down.
While he is looking around the bar, a hot blonde grabs the drink pours it on his head and stabs him with the umbrella
The man asks the barman "Whose that blonde?".
The barman replies "She's the piano player's girlfriend".
The man walks over to the piano player and says "Do you know your girlfriend poured a drink on me and stabbed me in the back."
The pianist replies "No, but if you hum it, I'll play it."