I work on an events platform (http://dandelion.earth/).
Users can rate events after attending them. I would like to build a recommendation system for new (as yet unrated) events.
At first I thought this was a collaborative filtering task, but since new events don’t yet have any ratings, I don’t think this is the right approach.
What’s a good way of recommending new (unrated) events to users? (or if we were talking about movies, how would I recommend as-yet unreleased movies to users?)