You are right about the location. Thanks for that meetup thread, I haven't read it before. I'm not aware of similar scenes in London. Here, it's in the center area, after I asked, they didn't ostensibly pay much attention to my presence, which was good for my purpose. The exposure time was 1/6 second, because I treated it as a try on environmental portrait, I was personally more focused on the ambiance around even though I knew that's not perfect shooting condition. Afterwards I heightened up a bit the grainy look, but I must say I'm not satisfied now. The density is still not right.