Well, sure enough, when we returned (after about an hour) the bar was open. A Thai guy came over and complained we were blocking his bar. He asked how long we were there and told us he had called the police.
OK, I'm an easy going guy, and this is Thailand, but I don't respond well to threats but gave it a try and apologized for blocking, saying it was closed when we got there, and he immediately said "Mai Pen Rai" and all was well.
I know we, in the past, have had posts where merchants have been violent when you parked in front of their shops, but I was curious if there is a law, or ordinance, against it or he was using the cops in case we refused to move, either as a bluff, or a paid for service.
