Me and Frankie laughing and drinking
Nothing feels better than blood on blood
Taking turns dancing with Maria
While the band plays "The Night of the Johnstown Flood"...

The highway patrolman and Frankie would dance with Maria to whatever the band happened to be playing. In a redneck roadhouse, that could be just about anything. I think what he have here is Springsteen locating his characters in a very particular cultural milieu: Believable only if you are familiar with the people, time, and places that he was hoping to evoke. Otherwise it's just gibberish.