Hi Jack, I'm an online marketer so if there is anything I can help with I'd be happy to be involved. I think the site is easy to navigate.
Your ideas regarding the user generated Events Calendar is great, I'm imagining something along the lines of
DontStayIn.com. I also think, though it's nice not to have advertising, it is expected to see ads on sites like this. Google Contextual ads would be unobtrusive and potentially relevant to the content.
Further ideas for content, could be to encourage the various sports and non-sports groups and clubs of Clapham to set up a profile on the Community page, enabling a Facebook Page style feel but on a more local level. Similarly local trades people could do the same, but there should probably be a distinction between profit and not for profit listings, with the former paying for space to discourage spam. [edit: written before I saw the above post]. Another idea would be to somehow link with the
Lambeth Freecycle Network.
In terms of promotion, you're already doing most of the free forms of promotion. If advertising makes some profit, perhaps paid promotion could happen. I would recommend search, but perhaps event sponsorship and/or a (re)launch event would get the name out locally.
One last thing, "secret london" has been a massive success story on FB, with the website showing a vision for the future with its
secretcities.com URL. Not easily copied, but the "love" prefix could be franchised out to others (perhaps delete that bit to stop people stealing the idea).