Our building was pretty much an illegal hotel all summer. Large, loud groups of international travelers ... parties nightly, suitcases banging up and down the stairs, people buzzing all apartments when they couldn't find the front-door key, and last but definitely not least, four apartments with bedbugs.
So, hoping 311 would be helpful for a change, several of us called in the situation. The first resident was evicted [late last week].
Lesson learned; You do not have to put up with this kind of intrusion on your living space.