Sometimes, its good to step away.  We tend to forget that other people are dying to lead too.  The silence, or deference of others may be due to you…taking up too much leader space.  Rotating chairs are all well and good, but its actually more fun to just not show up once in a while, with no warning, as it forces others to step-up with no prep-up.  It’s exactly the kind of challenge that people are looking for.