For when you're out in the city:
https://www.youtube.com/watch?v=lYRz-94oIaQ
(I used to use another one by the same uploader for "lower city" but it sounded too quiet for what I think is supposed to be a more typically crowded area).
For when you're at a bar:
https://www.youtube.com/watch?v=U2-eC8z-J5g
If anyone has anymore, we can share them here (assuming we can at least).