Speed geeking - a parallel series of brief presentations

What’s the best way to organize a series of brief presentations, aka Lightning Talks? One possibility is a Pecha Kucha or Ignite Night. Both these formats involve a ballroom, as shown above, with 20 PowerPoint slides being shown for a fixed interval of 20 or 15 seconds each. 

Another is Speed geeking. It is like speed dating but adapted to a group. The audience is divided into a series of small groups. Ideally each group listens to a presentation in a small conference room, and then rotates to the next one, as shown above. For a small group flipcharts might be preferable to PowerPoint (perhaps as printed handouts).

I recently saw Speed geeking mentioned under See also when I again looked at the Wikipedia page about Pecha Kucha. There is a better description of Speed geeking in the NHS IQ Learning Handbook. 

A table summarizes the differences between Speed geeking and Pecha Kucha or Ignite. It’s a more flexible way to organize a series of brief presentations that should be considered, particularly for planning educational sessions.