Thorin had been paying attention to his surroundings as always, but he still hadn't expected someone to know him by name. So, he looked over at Aragorn more intently, trying to figure out where the other man might know him from. He did look like someone from his world, but just in the general sense. Because of Bilbo, he knew that there were other people from their world that he may not recognize on sight. So, it was entirely possible that this was one of those people and he might of Thorin because of Bilbo. So, once he had come to that conclusion, he decided that it was best to not be rude. After all, this could very well be the man that had been friends with Bilbo. So, he didn't want to upset Bilbo.
"I would be honored" he replied, right before the barista called his name. Once he had the drink in his hand, he made his way over to the table where Aragorn was sitting. He took the seat across from the other man and placed his drink on the table.