Go to a nice coffee shop, get a gingerbread latte and sit by a window, watch people walking by and write (or hope a cute guy comes to talk to me ;D)
Edit: realised that's a bit dry. Good luck with the cute guy and enjoy New Year's!
To answer the question, I've heard anecdotal stories of atleast a few of my friends, how they got "adopted" by a random group of people celebrating in the city. Always be safe of course.