11 PM? Pish posh. I had a neighbor family of middle eastern dweebs start a loud screaming party in the apartment next door at 2AM once. Lol. In Hollywood, of course. They were really put out when I asked them to hold it down. 2 o’clock in the frigging morning fer crissakes.
I’ll agree 2AM is “that’s enough” time.
I’ll be considerate of your party, if you’ll be considerate of my sleep.
Going ‘til midnight is understandable. So is realizing others nearby aren’t part of it.
If you’re still going past 2AM to the obvious annoyance of neighbors, answer your phone/door and agree happily to turn it down. If not cooperative, expect escalation.
Listening to the Sheriff deputy dressing down the uncooperative host was amusing; the winning exchange was “but he’s going into the Navy tomorrow!” “Not now!”