Yep, i used to occasionally go to such places about 5 years ago. One was in the ground floor of a tower block next to Shoreditch park, run by a Brazilian girl called Talita. 2 bedroom flat, one of the bedrooms set up with tiny booths made with bed sheets, another room that just had a bed in it, and was usually used for the longer more intimate "dances". Living room filled with mainly Brazilian guys, a handful of British guys, and lots of Brazilian and occasionally non-Brazilian girls, some of whom were stunning. The girls wouldn't really dance, just move from lap to lap and get groped and fondled. But it was a real party atmosphere, everyone was smoking, everyone way more relaxed than in a club. You would drink whatever you wanted from the cans in the fridge, but one girl was keeping track, and you paid up when you left. And the parties finished whenever the last person left. I remember staying over once. Anyway, lost touch with the organiser. Similar parties are run today, but it's a very much different vibe. Still parties run by girls in private flats, but less of the party atmosphere, and more costly, with a completely British clientele, not really targeted at dancers fellow countrymen. Wish I still had contact to these more sociable (and cheaper) parties, I'm sure they must still exist.