What did he get?

The anxious one had two espressos, black with no sugar. One at the beginning of the meeting the other 30 minutes after. All the while he drank sparkling water. Sam thought that each sip he took was measured. He did it in the exact same way swishing the water around his mouth twice before swallowing. Out of all the customers he was the strangest. The strictest habits, that Sam thought carried further than the cafe. He was a chimera, in between the to go people and over stayers. In some ways he was like the to go people. Cold and efficient, he tipped well but always the same, 1 dollar. He didn't answer questions about his day. He just smiled politely. By now everyone just accepts it, but it is strange, Sam thought because everyone knows him. He is more than just a long stayer, he's a regular. They even know what sparkling water he wants. The conversation eventually ends when he looks at his watch, and his eyes go wide. Roger says the same thing, no worries man. And then he hangs around, thinking or something. Maybe he writes something down, maybe sometimes he asks for a refill. A lot of the time he takes a mug of coffee outside and just walks around a bit. Sam just didn't get it what did the anxious one get out of all of it? What did Roger?