Who said it is permitted?
Question for your LOR. Why would you be permitted to attend the “party” in the first place?
Kitzur Shulchan Aruch (SA) 33: Things that we don’t do because of danger.
“7:… Walking alone at night”
If the distance and event are permissible, also questions for LOR, maybe maybe maybe walk with someone else. –May be a yichud issue if no one is around and it’s with someone of the opposite gender.
If the area has a dangerous reputation and the only safe way to return home is via car, why a rabbi would tell you to go?
Also this is assuming this “party” is lekavod Shabbat and permissible for someone to attend.