Keep a Knockin' (But You Can't Come In)

... Keep a-knockin' but you can't come in Keep a-knockin' but you can't come in Keep a-knockin' but you can't come in Come back tomorrow night, try again I hear you knockin' but you can't come in I know you've been drinkin' gin Ou've been cheatin' 'round with other men I'm busy and you can't come in