So ... "what time did they arrive at Mike Lavigne's"? Did the four audiophiles all have watches on within COSC standards? Did they synchronize watches before beginning the journey? Without that information, at least, there is no way to answer without purely guessing. If they all drove separately, that is yet another variable. My answer can only be that some were late as the record had already started. Of course, better late than never at Mike's!