Hi Jeffrey,
It may also have to do with how "organized" the group's structure is. If
the dance is run by a 501c3 non-profit (or similar tax-free setup) the group's
by-laws may dictate how boards are elected, how long officers serve, what
offices are held, by whom, etc. Other dances may be more informally organized
& don't need to follow lots of R&Rs. Some venues require, or perhaps prefer,
rules of organization while others seem to just happen on an informal basis.
Depending on the circumstances I would say either model works.
Best to all,
George Fowler
Blue Hill, ME 1st Sat dance