I always buy the first round and the first meal. Had a guy I flew with as a new hire SO. Former Tigers guy who, on the ground was the greatest guy in the world. In the air he could be the biggest d1ck in the world. It was Marine Corps Bday and we were on a weekend layover in ALB. A bunch of enlisted Marines came into the bar at the hotel and started having a few with their dates. They were in their Blues and looked great. The Captain shows up and we start buying the Marines drinks. At the end of the night I said we should split the tab. He refused! He picked up the whole damn thing! Great guy. I never bought a drink around him and the FO never paid a tip. Still look forward to seeing this guy in the hub at night... He was a great liberty mentor.