Never did an impromptu session with an independent. In earlier phases of my life I did some spur of the moment dungeon visits. Two of those were the only time I ever sessioned less than completely sober. Both times I was drinking at a bar that was a fairly short distance from the dungeon. The first time I had 2 drinks and went ahead with the session which was run of the mill. The second time I had more than 2 drinks and went to the dungeon but during the selection process it dawned on me that I was too inebriated and selected no one then departed.