Not living in Paris, but in Poland we have similar living style. I don't understand a problem. Noise isolation is usually very good in modern apartments. I can organize a party, have 15 drunk people in my apartment talking loudly and after I go out and close the door I can't hear anything. We consider "noisy" a major quality flaw for the building.
Now that I think about it, I work in a four story office building and of course I never ever hear anything from the other floors. The apartments where I was were old and cheap. Must not have been built with sound dampening in mind.
Quite the opposite. I have terrible sight, buy my hearing is very good. The building I live in is just very well isolated, but in most of the buildings you cannot hear your neighbours unless there is something pretty loud going on.
And when they are that noisy it happens only 1 or 2 times per year at most. Give people a bit of room to have fun. If it is [much] more often they might get kicked out.
Informing the neighbors or inviting them to the party also works. If you are really pushing it you buy them some flowers and ask if it wasn't to much trouble the day after. If you have a normal relationship asking if the neighbors can tune it down a bit shouldn't be a big deal either.
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