It will only get ignored when they start to use the same people over and over.
Contrary to what a lot of people think, it's context that makes an apartment interesting, not just sex, and not even sex with different people. Piper is arguably one of the sexiest girls on the site and her and Hunter have sex very frequently. Bonnie and Clyde have different people over and have orgies fairly frequently, but there's a reason why both those apartments get ignored. At the end of the day, it's still the same shit going on in their places.
But when you take Samantha, who's in a relationship with Billy (who happens to be absent) and Stephan, who's married to Stella (who happens to be absent), suddenly the intrigue and excitement blows up, and it doesn't just become about some girl blowing some guy. I don't know if you were around for the whole Em and Sid fiasco, but there's a reason why people were glued to Em even though she technically didn't really do shit. Watching people in relationships fuck around without their partners around will almost always draw up some kind of hype. The whole thing with Lisa Grant and Juliet is another good example.