Without noise there is no function worth its name that can be held. Mike is a necessity. Otherwise how will people come to know that a function is being held. Louder the noise better the function.
Yeah, it seems like there is a false notion that the louder the music, the more fun they are having! In my city, in several places people have to put up with extremely loud and raucous late-night parties each weekend hosted by students and IT professionals in their shared flats! The nuisance grew to such an intolerable limit that many housing societies now have made rules against renting flats to bachelor youngsters, even girls being equally capable of hosting such parties, even single girls, both students as well as working are now refused as renters!