“darkened lounge”. It is a fact of life. Most nice hotels have the lights dimmed in their lounge. Guess what, they serve drinks there too. Just like a bar. the difference is the type of atmosphere and behavior that goes on. The same is true with Billiards rooms and pool halls. They can be smoke filled, alcohol flowing, loud and disgusting places (which is the image most people assume), and then there are those that are quiet, and believe it or not, dignified. These places exist.
UJM: Did you make up a mishna berura about this topic too?