I voted green, despite being born in Bromley. 
I think, if you really want a local site, you are the one who has to get it going. However, I joined this site to have online communication with intelligent people at a time that suits me (while having a coffee or tea break), not necessarily for meet-ups, although if they happen, then of course that is lovely. I did meet up with a lovely lady a couple of years ago, but I was still doing school runs and working part-time and found I really struggled to make time. I rarely look at the local pages. I suspect most of us don't.