Stewart, your workshop idea sounds great, especially as a series. In my experience people who want to learn to sing better need regular, continuous support and encouragement in a non-judgemental setting. I used to think that went without saying, but I've had to deal enough times with dropouts and hurt feelings over comments like "I'm not sitting next to you- you'll throw me off!" from other group members that it's a stated policy now!
AggieD, I'd love to have gone to that workshop! Who gave it?