How to make friends at Kings College as a postgrad?

I just accepted my offer from Kings College London. It was between that and U of Edinburgh which was the uni I initially preferred, but the masters programme I am going for is better at Kings. I am super worried about making friends in such a big city though. I know it is generally easier to make friends in a smaller city or as an undergrad because it is a bit more social, you are there for longer, etc. Any advice on how to make friends in London as a masters student? Thank you!