Local events feed (Happenings)

Resubmitting after review
`setTimeout(drawRandomUserShowing)`. In JavaScript we can pass around functions as first class objects.

Otherwise, though, this JS way of building HTML is a little weird. If you do much of it in an app, you'd end up using mustache or another templating language. If there's not much, it might be better served as a rendered Rails view. This hides HTML inside of the behavioral (JS) parts of the app, and that's not a good separation of concerns.