unconventional and bold?

I’m not sure how unconventional OST is anymore, but Stephen Citron writes in his rant Conferences without the Conferring are a Con:

Similarly, conferences could raise their game by allowing all present to participate, contribute, express themselves and be listened to. Some have already taken this delegate focus to extremes, with unconventional and bold “unconferences” and “open space technology”. These are group sessions that run without prior agenda or speakers, and look to the delegates to create content on the fly.