I saw this guy leave his apartment the other week. Looks to be early 30's. He's been living there for at least a year.

He plays pop music with the bass turned up, I got him to lower the volume by slamming my heavy lifting bags on the floor to get the point across. Initially I was just jumping/stamping on the floor, small brain. The bass is still tuned up to disproportionate amounts but alright.
He has parties every other week, sometimes until 4am. Not usually music, but lots of drinks because they giggle and talk at high volume. Oh and singing too. Sometimes the boys, but occasionally you'll hear a girl. I assume they're all a similar age.

I might catch a few negs but I believe after 30 this kind of behaviour is pretty degenerate, you should have grown out of making a chit tonne of noise in the vicinity of other people who are just trying to relax at home (or sleep!). If you have to party after 30 just do it in the phucking city centre. There are lots of young families here with young kids as it's a new development.

Anyway it'sSunday at 6:30am, I'm waking up anyway as I leave the blinds open and it's daylight. Party is occuring. Camel's back has broken. I go downstairs, bang heavily on the door. The guy opens the door a crack, pokes his head out, is all apologetic and I say things like "What time is it" and "Too much noise" in Polish. Not my native language btw. He apologises again and I walk off full of adrenaline. They're still at it, but lowered volume and hopefully I got the message across for the future.