Roslyn, the Board certainly can hire a director or officer to perform tasks OTHER than serving as a director or officer of the Board. So, you can hire a director or officer to attend or supervise or monitor workshops. However, the Board is at risk of demonstrating that the compensation is reasonable for the duties hired, and that the duties were within the scope of the Board's normal activities.
As a Director of an HOA, I would be willing to defend hiring a Board member to sweep the entry three times a week at say, $30 a week; I would not be willing to defend hiring a Board member to publish a newsletter for $100,000 a year.
All the best,