I see the anonymous Guest was back at 1034. It's interesting to see how he has wit at the same level as his manners.
Marion, a buskers pub is a pub where you could expect to meet other buskers. In Köln it used the be "Der Lederer", where buskers would mingle with the usual crowd, railway workers and quite a lot of people who worked at the radio and television service in the building opposite. In Basel, it used to be "Chateau Lapin/Hasenburg". Many towns had one. Phil Free, the finest outdoor comedian I ever met, jokingly used to refer to the busking pub as, "The Office".