Muso walks into The Man of Kent in Rochester and sez to the barman,"I just heard this really great joke about a drummer"

Landlord shrugs and says, Now before you tell that joke, you see that guy over by the fire - the one who's 6 feet 47 inches tall, coered in tatoos with the machete hanging off his belt - he's a drummer..." Then he points over to the corner. "See that little bald guy over there covered in scars and currently eating his glass before ordering another quadruple rum - he's a drummer too. Now...do you really want to tell that joke?"

Muso: "Well, not if I've got to explain it twice."