this type of place is fairly inconsistent, the older ones a bit desperate for business and tend to be mean and fight with the younger better looking girls who appear for short periods of time
sometimes they figure out that a young beautiful one can attract good repeat customers and that they will pick up the overflow but for the most part drive the young ones away
Mamama's at these places evolve to high temper types as the deal with the frustration of not knowing when and if the temp girls are coming to work, Asian customers tend to just drop by and have a look since phoning is no indication of who is working (bait and switch)
The mamasan I was close friends with was a nervous wreck between worrying about who would show up, who would be fighting with who (loud shouting exchanges, not good re neighbors), high traffic coming and going from the building and being found out and kicked out of the building, etc etc
The other problem was that if there were two really beautiful girls working at the same time, rivalry was fierce and the younger one would bait the older one and fighting erupted, lots of cat fights at these Asian micros which is why I presume the Maggie, Mun Mun, Tina, etc move the girls around from time to time. To separate the ones with bad chemistry.
I think this is why some of these places are hit and miss having watched this going on in one micro I had an inside track with.
just sharing some thoughts and logic