There is a site set up for users (and organizers) to list every public lecture in the United Kingdom. The Lecture List. As DonkeyOnTheEdge describes it: "Anyone can post their events to the site regardless of size or funding. The
service is free and entirely self-service. It’s a completely open system but the
content is moderated."
Here’s how the Lecture List describes itself:
It’s very simple, costs nothing, and once your free account is set up you’ll
have total control over publishing your talks.
The site is searchable by date, speaker, region, organising institution and
topic. Users can also sign up to receive regular email messages about events in
particular parts of the country, on particular topics or by particular speakers.
For example, this shows there is a lecture Friday on American politics at the Institute of Advanced Legal Studies, notes the length (two hours) and that it is free. There is a link to a map that shows where the institute is in London. Can this be duplicated in any city? Is the limited cost matched by enough revenue from Google Ad Sense?